Limp Mode

What is Limp Mode? – Symptoms, Causes & Diagnosis

In Engine by 85 Comments

Did your car suddenly become really slow when accelerating, and at the same time, it seems like it will not rev above 2500-3000 RPM while the engine light is flashing on your dashboard?

Then your car is most likely in a condition called Limp Mode. Why does this happen, and how expensive will it be to repair my car?

In this article, we will go through what limp mode is, the most common symptoms, causes, and how to fix it.

What is Limp Mode?

Engine Light

Limp mode or limp home mode is a security function for your engine and transmission. When the engine or transmission control unit recognizes a seriously wrong parameter from the engine or transmission, the car will go into limp mode.

The limp mode often reduces the power and limits the engine’s RPM to drive your car to a workshop without damaging the engine.

For example, Your engine control unit detects that your turbo boost pressure is 2.0 bar when the maximum boost pressure should be 1.3 bar.

Overboost may damage your pistons or other internal parts very fast, and therefore, the ECU limits the engine power.

Many car owners do not take enough notice of the engine light, and therefore the engine control unit sets itself to limp mode, shuts off the turbo boost completely, and puts a max RPM limit to 3000 RPM’s sure that you won’t blow or damage any engine parts.

Limp Mode Symptoms

But how do I know that my car is in limp mode?

How can I notice it? The most common limp mode symptoms are check engine light, reduced engine power, RPM limit, or stuck gear.

Here is a more detailed list of the most common symptoms of limp mode.

1. Check Engine Light

Check Engine Light On Dashboard E1609869927250

The check engine light is the first thing you will notice on your dashboard when the car is in limp mode. You can often experience this light together with an EPC light or a similar.

If the check light is on your dashboard, it is definitely time to check the trouble codes with an OBD2 scanner.

Related:  Fuel Injector Symptoms, Location & Replacement Cost

2. Reduced engine power

Slow Acceleration Car

Limp mode helps you protect your engine from further damage when it notices something is wrong with the engine.

To prevent more serious damages to your engine, the limp mode will reduce the engine power heavily and, in most cases, obliterate the turbo pressure.

3. RPM limit lowered

Rpm Limit

Another safety feature that your engine control unit uses when setting your car into limp mode is lowering the RPM limit heavily. If you realize that it is impossible to rev over 3000 RPM in your car – it is definitely in Limp home mode.

4. Stuck in Gear

Stuck In Gear

If you have an automatic transmission, your car might limit the gear shiftings on your car, depending on your car model. It often happens that the transmission won’t shift over gear 3 for your engine’s future safety.

As you may understand, if the RPM limit is at 3000 RPM and your transmission is not shifting above gear 3, you can’t drive very fast.

If you notice all these symptoms at once, there is no doubt that your car is in limp mode.

What Causes Limp mode?

But, What things can actually cause my car to go into limp mode? The fact is that a lot of different things can cause limp mode.

The most common causes of limp mode are boost leaks, overboost, faulty engine sensors, transmission issues, or wiring issues.

Here is a more detailed list of the most common limp mode causes.

1. Engine boost control problems

Turbo Spool

The most common cause of limp mode is boost-control problems. This can be either a boost leak or, more likely, overboost. Overboost can happen if you have a turbo car, and it is quite critical to your engine, and therefore the engine control unit will limit the engine power because of this.

Common things that can cause overboost are a faulty wastegate, broken wastegate hose, boost control valve, or a faulty boost pressure sensor.

2. Faulty engine sensors

Car Engine Sensors

Other common causes of limp mode are faulty engine sensors. The engine has many different sensors that can cause limp mode, so it is not very easy to find out which one. Do not worry; later in the article, I will show you how you can diagnose it properly.

Common engine sensors that can cause limp mode are MAF sensor, engine temperature sensor, boost pressure sensor, or O2 sensor.

3. Transmission Issues

Automatic Transmission

If you have an automatic transmission, the transmission control module can actually set the car into limp mode if something is wrong with the transmission. This can often be a faulty sensor, faulty valve, low transmission fluid level or

4. Wiring Issues

Broken Wire

Wiring issues to the engine or the transmission are also pretty common when it comes to limp mode. It can be a broken wire or just corrosion at a connection.

Related:  EGR Valve Symptoms & the Replacement Cost

For example, It can be broken wire to a boost pressure sensor, so the engine control will not control it properly. It can also be a missing boost pressure signal, making the engine control unit not take any risks and set limp mode.

How to fix limp mode at home?

Fixing limp mode often requires a full diagnosis to replace parts and waste money without results.

However, there are some free things you can try at home to try fixing your limp mode. It is not sure that it will make any difference, but you have nothing to lose by it either!

1. Check All fluids

Check Oil Level

Start by checking all fluid levels in your car. These include the engine oil, coolant, power steering, transmission, and brake fluid level. The significant one is the transmission fluid if you have an automatic transmission.

Make sure that these fluids are in good shape and if you can see anything strange with them. If you have not replaced them in a while, it is maybe time for a fluid change.

2. Clean MAF Sensor

Intake And Maf Sensor

The MAF sensor controls the air-fuel mixture in your car, and it can often become dirty, especially if you have an open-air filter. Dust and dirt on the MAF sensor will often cause it to send wrong values to the engine control unit, which may cause limp mode.

Remove it and carefully clean the sensor with an electronic cleaner. Remember that the sensor is susceptible, and you should not touch it with your hands.

3. Check & Clean or Replace Air Filter

Dirty Air Filter

The air filter makes sure that the engine always gets clean air without dust or dirt. If you have not replaced the air filter in a while, it can be so clogged that it will cause problems with the intake air.

The air filter is often easily located and often easy to clean. If it is filthy, it is probably time to replace it, though.

4. Check Trouble Codes

Car Diagnose 1 E1584620158760

If you checked everything above without results, there is nothing more to do than making a proper diagnosis not to waste your money.

To make a proper diagnosis, you need an OBD2 scanner to check the trouble codes stored in your engine control unit.

To fulfill a proper diagnosis, keep reading to the next section, where I show you how to diagnose it.

Limp Mode Diagnosis

Car Diagnostics

As you might know, the limp mode can be caused by many different things. This means that we can not just replace things and hope for the best of luck. To diagnose limp mode easily, you may also need some tools. If you do not have these, you can either borrow them from someone or let a mechanic workshop diagnose it.

  1. Connect an OBD2 scanner and check the trouble codes. When limp mode occurs, there is always a trouble code stored in the engine control module or the transmission control module. Continue the troubleshooting with the given trouble code you will get. You can find a lot of trouble code information articles on our sites also for more information.
  2. Check the boost pressure sensor with your diagnostic tool in live data – make sure it gives realistic values at idle or ignition. Replace if faulty.
  3. Use a vacuum or pressure gauge to test the wastegate and make sure it moves freely. Use your diagnostic tool to test the boost control sensor by testing it while putting pressure or vacuum on the wastegate. Replace the sensor or replace the wastegate if faulty.
  4. Check for intake leaks with an EVAP smoke machine. Repair any possible leaks or PCV valve.
  5. Check the MAF sensor values, O2 sensors, engine coolant temperature sensor, throttle position sensor, and air temperature sensor. Replace if faulty.
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Estimated Limp Mode Repair Cost

Some problems are more common than others when it comes to limp more. Here are the estimated repair costs of some parts that often cause limp mode. Prices include labor and part costs but do not include diagnosis costs.

  • Boost control valve replacement – 50$ to 150$
  • Boost pressure sensor replacement – 50$ to 100$
  • Wastegate replacement – 150$ to 250$
  • Turbocharger replacement – 500$ to 1500$
  • MAF sensor replacement – 200$ to 400$

FAQ About Limp Mode

What to Do if Limp Mode Occurs On the Road?

If the limp mode suddenly happens while driving the car far from home, make a safe stop as fast as possible to check for any leakage, smoke, or noise from the engine or transmission. If everything seems okay, you could either drive to the closest workshop or get it towed if you feel uncomfortable. If that’s not possible, find the shortest way to your home.

How serious is Limp mode?

The limp mode should not be ignored. If you notice that your car has gotten into limp mode, you should fix it as soon as possible. The limp mode is designed so you can drive the closest way to a workshop to get the problem fixed.
Do not drive around with Limp mode is unnecessary.

85 thoughts on “ What is Limp Mode? – Symptoms, Causes & Diagnosis ”

Comments
  1. I have a friend that’s selling a dodge caliber but its stuck on limp mode and it won’t let you drive faster than 20mph? What can be the problem?

    1. I’ve tried everything put a new transmission and input output sensors unplugged the battery for 5 minutes all kinds of stuff I’ve heard on the internet and nothing I’m thinking maybe my computer has to be reset or clear it or something but that cost a lot of money

      1. Hi Robert,
        Try unplugging the cruise control switch on on the brake pedal.
        My cruise control control module is a integral part of the Engine Control Module or ECM.
        You may need to send your ECM out for repairs and recalibration.
        Remember there are only three parts to a drive by wire system. Throttle pedal, electronic throttle body and the ECM. Most likely the cruise control circuit has malfunctioned and is keeping you in limp mode.
        I removed the cruise control switch and the engine roared back to life in drive. That’s when I discovered I had a bad bearing in the transfer case.
        Limp mode was preventing me from seeing this problem. In limp mode I didn’t have the power to climb a short hill. Limp mode disabled the torque converter and prevented the car from gaining enough speed to overcome the hill.
        Very aggravating.
        Hope this helps.
        Clinton Gregg

        1. Hello Clinton I have this same problem and i replaced the whole ecm and its still stuck in limp mode. 07 navara

      2. 2005 Honda Civic LX drove fine for two days when I bought it, third day backed out of the driveway and tach/temp gauge dropped, limp mode now

      3. I have replaced the ega valve but still goes into limp mode what could be causing it

      4. Hi, have a 2009 Honda jazz 1.5 litre, started with a minor idle issue after a few days the engine check light came on eventually went into limp mode. This usually occurred after 10 min driving in the morning. I had the injectors cleaned but still went into limp mode. After turning the engine off and restart it was normally ok for the rest of the day. Two days after injector clean the engine blew a spark plug out on no 2 cylinder. Coil was destroyed, Managed to get new plug back in but with only 1/2 the threads in the head. It now misfires on 2 and 3 and stays in limp mode. Garage that has it says plugs, coil, injectors, valve clearance all good, said if problem cannot be solved a replacement engine might be the best way to go. Car has 350000 km and has been well maintained. Scanner used used but seems like it can only help so much. Any suggestions would be much appreciated.

    2. Is there inning one that can help me with a scanner labtop.

    3. Hello I’ve got a 04 landcruiser down in power but when accelerating the engine check light comes on and the power just goes. When I restart engine the light goes out but a lot of black smoke when I rev it up. Any idea what the problem could Be?

  2. Author

    Read the trouble code memory with a scanner. When the limp mode is on, there is always a permanent trouble code stored in the memory. It’s cheaper to read it and get a fast answer than guessing and just replacing parts!

    1. hello, having same problem-read codes with obd2-got nowhere.
      transmission control system module was the code i got-replaced transmission speed sensors, then replaced fuel pump just to be on safe side. still having limp mode… in past 2 weeks it went from limp mode 2-3 times a day to limp mode 24/7.
      Help?

  3. I drive a 2013 Honda Civic Si sedan. I don’t know exactly if this is considered limp mode but, the first time I experienced this was after I got a stage 1 clutch installed. My CEL, VSA, Power steering light all came on. I was driving about 65 mph and then my gas pedal stopped working. I was able to down shift and up shift in my car but that was it. Gas pedal stopped. My speed was also decreasing slowly. But what caused it when I checked and inspected was a loose oil drain plug which I tightened it then my lights went away and I was able to drive as normal. But then again it happened but this time it wasn’t an oil drain plug. I just let the car sit then went to research on what it could be but I’m seeing that I need a tune because my stage 1 clutch is not OEM. Could this be it?

  4. Author

    The oil plug should not affect the Limp-mode and is most likely a coincidence. I would recommend you to read the trouble codes in the engine control unit. When the limp mode is active, there is a stored trouble code and you want to check this code as it will most likely lead you to the problem!

  5. I own a 2000 Mitsubishi Mirage de 1.5 “automatic” that recently went into limp mode .. I took it to the mechanic to get it checked out. They put the one scanner in order to read the codes. The codes came out to be the transmission shift solenoid . I bought all five shift solenoids used of eBay ! The mechanic installed the part today with new transmission oil, he test out the car and end up going back into limp mode!?. What could be the issue now , if the part got replaced!? The mechanic told me that it might be the transmission that needs to be replaced!?. I’ve been the second owner!? Please help :/

    1. Author

      @Jc

      You should read the trouble code memory again and check if you have a trouble code on the shift solenoids again. It does also matter a lot of the trouble code is saying an electric or mechanical fault. If the shift solenoids are replaced, and it does still say “Electric fault shift solenoid”, the problem is most likely in the wirings or the transmission control unit. You can measure up the shift solenoids function with a diagnostic scanner and try them manually to make sure they work as they should.

      If the trouble code says mechanical fault, it can be dirty oil or clogged up a transmission and you have to inspect it further, which can end up with a transmission replacement in the worst case!

  6. I have a 2012 Honda accord in limp mode. Car want go past 25mph. Checked the codes and showing crank sensor, and o2, o3 misfire and random misfire. Any suggestions on what I may be experiencing?

    1. Author

      @Heather L Bryant
      I would recommend you to erase the trouble code and start it again to see which trouble codes that would get triggered first.
      Now the trouble codes depend a lot of the O2 sensor says lean mixture or electric fault etc.

      In this case, there could be a problem with the crankshaft sensor, O2 sensor (Depending on what trouble code it have). The misfires can be caused by a faulty Crankshaft sensor or O2 sensor. It can also be caused by an intake leak around the intake.

      But if you have a scanner, erase the trouble codes and check if the crankshaft sensor trouble code or the O2 sensor code appears first. If you have O2 sensor “lean mixture” trouble code and the misfires, I would start to check for any intake leaks around the intake and the hoses.

  7. Have a 2001 mercedes sprinter (diesel/manual) that constantly goes into limp mode around 80 degrees on temp gauge.
    No codes ever show up on the scanner (obd2) and have replaced radiator hose, turbo sensor, air and oil filters.
    Im at my wits end with this thing as it goes great for a few weeks and then bam back to limp mode.
    I also cant3get the glow plug light to go out.
    Any help would be great as the town I live in doesn’t have a mechannic that will touch it – apparently its all too hard work (lazy smucks) and the authorized place wants to charge me 8 grand!!

    1. Author

      @Stephen

      Did you try with any other scanner to see the codes? If your car feels a bit low on power before the limp mode occurs, I would start to check for any boost pipe leaks and the function of the turbo system. Check that the wastegate arm on the turbo moves freely and that the vacuum hoses is okay.

      But however, when this occurs, there should be trouble codes stored and it’s probably just the scanner that cant read then. The best bet here would be to try another if possible, one that can read enhanced trouble codes would be the best 🙂

      1. I have a 2012 Nissan Altima with 182,000 and the battery light and ABS light are both on and the check engine light sometimes blinks but sometimes goes off. The cars keeps going into limp mode. Brought it to Nissan and was informed it was a misfire on cylinder 2. Replaced the coil pack on that cylinder. Ran better temporarily but when it went back to limp mode brought it back to Nissan and now its giving a code concerning the catalytic converter. It seems that the batter is having trouble recharging. Already swapped alternators but upon being told my core was good i swapped them back. I purchased Cataclean (auto zone manager recommend it) and added it to a 1/4 tank as instructed but after starting it and attempting to drive it it rapidly went into limp mode and then killed. Wont restart. Should i replace the catalytic converter considering it seems like a battery issue more than a cat. conv. issue? My faith in Nissan is almost gone due to them not finding the cat code during the 1st scan plus the fact that i heard Nissan merged with Fiat and Renault years ago and ive heard they are both junk. Please help cause im almost ready to just sell the damn car to a junkyard and not buy another Nissan.

  8. Have discovered that the fan isn’t cutting in at all when engine is getting warm.
    Can get it to work when I connect straight to battery and car not moving but it won’t work when driving for some unknown reason. Any help on that would be gratefully received.
    Also having trouble locating the egr valve on my sprinter, have looked in books and online but not one mention of the location.

    1. Author

      I would suggest you check the coolant temperature sensor for the cooling fan. Sometimes the car uses two different temperature sensors for the engine control unit and the fan control unit!

  9. I have a 2007 Toyota Camry and this is the second time that it has gone into limp mode within the last two months .It was a bad alternator the first time that it happened .Im wondering if it could be the alternator again. Or do you have any suggestions on what it could be it wont even go 5 mph

    1. Author

      @Tybrina Unfortunately, it’s very difficult to guess on this one. It could absolutely be the alternator again, but you have to read the trouble codes again to know for sure. Post the codes here if you have any and I will try to help you out 🙂

  10. I have a 2018 Kia with only 10K miles. I got a Kia letter telling me that it’s a possible rod bearing problem, if it goes into engine limp mode to take it in right away. I’m sure that should not be happening to a brand new engine in a car I just bought. Not a happy camper right now. I think I want my money back or something along those lines if I have a defective engine. What would you do?

    1. Author

      Difficult situation. If they have found a solution to the problem, it might be running for very long after the repair/fix. I would absolutely consider trying getting the money back because a bad rod bearing on such a new engine can cause really expensive repairs in the future when the warranty has expired. For example Volkswagens problems with the 1.4 tfsi engine, even if the new parts are stronger the problems still come back later on again.

  11. Limp mode may be great but not much fun when you are 200km away from the nearest town, have no telephone signal and it is stinking hot and you are towing a caravan! An inbuilt fault detector would be great! Long storey but to me Engine Fault Light on is about the best way to increase your blood pressure – modern cars are great but are totally disasters when you are “out-back” and the dreaded limp mode starts. City-Slickers invention!

    1. Author

      Yes, Limp mode can both be good or bad depending on the situation. However, I would really recommend getting an OBD2 scanner, like the BlueDriver if you have a smartphone. Easy to connect to your vehicle in those situations and to check the trouble codes, and even erase them and keep driving if it was just a temporary problem.

      They are small and can be stored in your car.

  12. Will a 2009 bmw328xi go Into limp mode is the oil filter housing leaks out all the motor oil?. my main question is will it go into limp mode before blowing the engine?

    1. Author

      @Sam Limp mode won’t save an engine without oil pressure. If the oil pressure is dropped it will seize and damage the bearings on all RPM’s. If the engine loses oil pressure, you should shut it off immediately.

  13. Hello, my car is showing this codes:

    “Altitude sensor signal/intake manifold pressure, implausible ratio-”

    and

    “Air intake system, Leak detected-”

    What should i get replaced as i feel like the technicians are guessing

    1. Author

      The trouble codes together indicate that there is a problem with your EGR valve. However, it’s just a guess here but from my experience, these codes do either tends to be a problem with the EGR or a boost/intake leak.

  14. Citroen C2 goes into limp mode plugged in says missfire cylinder one, replace coil pack spark plugs, crank sensor and recently had new timing belt too but that’s been re checked again too, garage can not find fault?? Restart engine and drives fine again. Prob next day it do it all again??

    1. Author

      Normally when you get misfire on just one cylinder, it’s either spark plug/coil, bad intake gasket, Compression or a bad fuel injector. It can also be a vacuum leak but there is often trouble codes on other cylinders also.

  15. I own a Mercedes-Benz c-240 it just went on limp mode and I would like to know how could get it out of limp mode

    1. Author

      You have to read the trouble codes with a scanner to get a clue of how to get it out of limp mode. You can also remove one battery cable to reset the ECU, however, if the problem is still there. It will go into limp mode again.

  16. 2001 Honda Passport LX 4×4
    Codes – p1125, p1295, p1515
    Stuck in Limp mode

    I couldn’t get car to start unless I feathered gas pedal and stayed on the gas to keep rpm’s up. I figured it was just the Throttle Position Sensor, I changed it, and now the car will at least idle without me having to use the gas but even after clearing the codes I couldn’t get it out of limp mode and then the same 3 codes came back up a while later. I even tried disconnecting battery cable for an hour then reattaching. About to change the fuel filter as a last resort. I just really don’t believe its the PCM, that would be just so bizarre. Only other thought is something funky with the wiring somewhere, but I couldn’t find anything obvious. Any ideas? This vehicle had it’s transmission rebuilt, also had to throw another engine in it as well. I did notice some burning smell coming from the wheels while driving it before, but figured it was just brakes riding or the little plate behind the rotors riding on the rotors, but not sure if that burning smell maybe something else now. Thanks for any advice you may have!

    1. Author

      You have to check the power, ground, and signal for the TPS sensor. I’m not sure if you have an electric throttle body or a throttle wire. However, if there is an electric one, there might be a problem in the electric motor, or on the accelerator pedal.

      Are you sure that the TPS is correctly fitted and that the basic setting is done after the replacement, check for broken wires!

  17. I have a 2013 Sentra that went into limp mode after the brake fluid got low and the traction control light came on and stayed on. After fixing the low fluid problem, the light has stayed off, but it still seems to be in limp mode. What do you suggest?

    1. Author

      You might have to erase the trouble codes with a scanner or remove one battery cable for 10 minutes to reset the control units!

  18. Have a 2006 Mitsubishi outlander. It went into limp mode and the code that comes up is P2135 & P2135 again. This is the only car I have to get to work n back so I’ve been driving it around town at 30mph. I’ve replaced the throttle body and still same problem. Please help me fix it?!!??

    1. Author

      If the throttle body sensor is replaced, and a basic setting is done properly there is most likely a faulty wire between the engine control unit and the throttle body sensor that is causing your problem. I would recommend to let a good workshop make a basic setting and measure the signals from the engine control unit for you.

  19. A friend of mine wants to give me his 2004 Nissan Murano. They have told me that usually in summer, and not very often, the car will not move at all from a complete stop for 20-30 seconds, then it just takes off and it’s fine. Never one engine light or codes. No mechanic has found the problem and I believe replacing the throttle body was the only part replaced so far. My only clue is it happens in hotter ambient temperatures. Tranny overheating? I am worried about using it for a daily driver. Thanks

    1. Author

      Does the engine shut off completely for 20-30 seconds or is it just not driving forward? If the engine is going down, you should measure the fuel pressure while it’s shutting down. If the pressure is low it could be caused by a bad fuel pump or fuel pump relay. Other common causes for sudden engine stop is a faulty crankshaft sensor or a faulty throttle body like you mentioned.

  20. Good day,

    i am driving a Q5 2.0TDI the vehicle start and cut off the fuel. @ audi they did all the test and replace fuel pump as well as fuel control unit but it didn’t solve the problem.

    Today i am getting answer that the vehicle is on limp mode.

    what can be the course

    1. Author

      You should read the trouble codes and post them here. Are you sure that it’s not an immobilizer problem? Usually the engine will run for 2-3 seconds and then shut off if there is a problem with the immobilizer/key recognization. This problem will shut down the ignition and/or fuel.

  21. I have a Ford Transit Diesel. Fault codes for DPF and DPF temperature sensor bank 1. The vehicle was running on limp mode during this time. I have removed and clean out the DPF and put back on to the vehicle but the limp mode still there. However I have re scanned and now fault code for temperature sensor now came up. I then removed the sensor and cleaned out and put back to the vehicle but now received a different symptom. The vehicle only starts and run for 3 to 4 seconds and shut it self off. It will take up to one or two hours may be longer to re start again but only run for 3 to 4 seconds. please help

  22. Hello there. I got a question to ask. My car model is Mercedes Benz C 204. Recently, the transmission of gear getting slower. I had done the OBD SCANNING. But no faulty was detected regarding transmission. Can you guide me on how to solve it? I already asked mechanic to look for the causes. Still no solution. Thanks in advance.

  23. I have a 2017 Kia Soul that has gone into limp mode three times,the first two happened right after filling my tank and the mechanic though I had to have topped off the gas tank .I may have but I don’t think so. The first time it started up the following morning. The second time I had it towed to a dealer and it must have started right up the following morning ( that’s when the mechanic assumed I had topped it off ) the third time I was nowhere near a fuel pump and I was at the ranch when, for so train, it went into limp mode and stayed the following am. I had it towed once more and for the last three days the mechanics have been trying to get it to go into limp mode again. Apparently the can’t find any coded in the computer that would indicate specific problems Help!!!

  24. Hi Magnus!
    Thanks a lot for your info, very helpful indeed.
    I drive a Megane II 2.0T I have an intermittent limb mode, sometimes the car takes a while before it fires up, gets into limb mode briefly at idle and while driving slow than it just gets stuck at 2500 revs then it quickly goes away, put it on my OBD 2 scanner it came up with lambda sensor fault so I took it to a garage just to be sure they got the same fault so I went and bought the 4 wired sensor but it came out with different plug than the one on car but wires all the same but still gets the same symptoms and fault as previously. Is it possible that the sensor is not compatible with the car or do I have something else faulty. My coils and plugs got tested and they fine.
    No other sensor comes up except the 02 sensor
    P0130 and P0141 being up and down stream 02 sensor.
    Could it be electrical?
    Will a non turbo sensor malfunction on my turbo car?
    Thanks again.

  25. I have an 05 toyota highlander. It wemt into limp mode with the check engine, trac off and vsc light on. The OBD told me code P2102 throttle actuator control circut low. I replaced the throttle body, relays, fuses and accelerator. Ive done the idle relay reset and cleared codes, and still same thing. Limp mode still on. Please someone help me!!

    1. Did you ever find out what it was? I’m having the same issue when I replaced the alternator and can’t figure out how to get the car off of limp mode.

  26. Hi from South Africa: (Sorry for the long story.)
    I know I make a mistake buying a Scenic 2004 1.9dci but was cheap with a lot of space for my 2 small boys. then slowly start fixing it, done: the Motor, the turbo, the injectors & turbo hose pipe, put new mass air sensor, clean the boost pressure sensor. And still have no power, meaning I press the accelerator hard and no power is like the motor is starving, at any uphill need to go down to second even first gear to make it. Done the diagnosis last time and the boost pressure sensor is in fault and can’t get it to clear .
    Could that fault be the cause of the Scenic not giving me any power when I accelerate on 3rd or more? & why the motor die on the uphills? I can’t believe the problem is in the Hi pressure diesel pump. I did specialist check the diesel filter & injectors & they are ok. They want to charge me ZAR 4000 = $ 285 just to check the diesel pump and to repair it ZAR 8500 = $ 600
    First how do I know that they will be honest enough and say the pump was ok after testing it, they can easy say that is not pumping properly to make more money and I will have to believe it. But imagine If I can save in time $600 to do the pump, then after they put the pump back, there is no improvement at all in the scenic. What would you do?
    I insist it could be a bad contact wire. May be the on board computer sense a error in the system(boost pressure sensor) and don’t let the diesel pump supply the right amount of diesel for the equal position of the accelerator. I promise, while you are driving (slowly) push the accelerator and no reaction, nothing happen, is so frustrating I can’t explain it. I stop a year ago taking the children to school with the Scenic as I was embarrass going in the uphill of the school in first gear to get to the entrance while all other dad’s overtaking me and hoot without understand that is not my fault. (that bad). Save some money done the injectors and still the same. Now I need it in case it rains to go to a new job (I usually drive a motorbike) What can I do next?
    Any suggestions? (except putting petrol on it and burn it).
    Thank you

  27. Hi from S Africa. My mazda 6 2007 has had a complete engine overhaul. Mini cath in place. Radiator, starter and alterntor replaced. While in motion, not always, it occurs that the car suddenly goes into limp mode. Engine is running but no acceleration. Engine management light is on. Sometimes it occurs that the same occurs, but the car just switches off and stalls. I then have to ooen the bonnet, remove the battery terminal lead, wait 20 seconds then put back, start the car abd go. But the problem occurs again at any time without any warning. Fault code sats ecu, but had that checked and shows no problem. Does not occur when idling.

  28. Is there any way the cold start switche can affect the acceleration of the car

    1. What are the common reasons why electric throttle pedal fail to respond

  29. 2004 honda civic check engine light is on not flashing, RPM not reading, temperature gauge not reading, green key flashing, car starts ,runs at reduced speed no power ,hooked up odb ll won’t read codes, I was backing out of my driveway car started acting funny, smoke came up from under the hood I pulled back up in the driveway shut the car off open the hood and belt for alternator an AC was burnt off the AC pulley froze up I took belt off and got a replacement belt without AC started the car up and my results I written above

  30. My 2010 Pajero Activ is going into Limp Mode but mechanic says no diagnostic faults recorded, everything looks good mechanically. Fuel filter and suction control valve replaced. Auto electrician also unable to find fault. Any suggestions?

  31. can wires going to place were your code reader b
    or not connected right or messed up can that cause it to go into limp mode,and can a whole inuffler cause it

  32. Hi,I have a Mercedes-Benz vito 1998 model,it’s in limp home mode and when I run it in the diagnostic machine it gave an code B01ff that’s stated “short circuit on ground ” could this be the reason why it’s in limp home mode?

  33. I have a Toyota Ractis 2006 model with a 2sz-fe engine and a CVT transmission.
    The chain inside transmission box got broken, so I replaced the whole transmission. Now, after the replacement, my car started going into the limp mode after driving it for few kms, sometimes even at idling. What should I do?

  34. I have a BT 50 MADZA the power train light come on when driving long distances or going up an incline (hill) The vehicle goes into limp mode but get off the limp mode if I stop and restart the engine I scanned for codes and the only code that is generated is the P00BD Code. The only thing that was done to the vehicle before having this problem was changing the oil and filter and diesel fuel filter.
    The intercooler boost hose was also changed because it was burst.
    Any help will be much appreciated

    1. Hi mate I have this exact issue, I’ve replaced the air intake sensor, map sensor, camshaft position sensor so far and still not better. After the new Camshaft sensor went in it ran the best but still not right. Took it for a big drive out it on cruise on 107kmph and first slight incline went into limp mode (light flickered and turned itself off) but still had to kill the engine to get running properly. Mine also always feels like it got the hand brake on or towing something?! No smoke, if I put my foot down it drives fine and no big transmission issues, only it won’t gear down unless I floor it?? Did u resolve ur problem I’d love to hear how if you did???

  35. Hello. I have a 12 bmw 335i e92 coupe with full bolt on. When im accelerating in stock form i can floor it constantly and not have a problem at all..but when i put on jb4 piggyback and i accelerate hard then here comes limp mode and even the winsheild wipers come on! i thought the jb4 was the problem so i took it off and then took it to Dinan for stage three ECU flash..drive out of the parking lot try to do a forty roll and guess what..limp mode again..this is baffeling me , Dinan performance and my mechanic. In stock form with no extra boost hp or torque with full bolt on it is smooth sailing like a rocket but would be nice if i could run a tune and it not go into limp mode! This is also almost impossible to log because of course when i cut the car off and restart it will erase the log because its just fine then after say 15 seconds and will drive fine unless i accelerate a little hard..then limp mode…please help if you got any ideas please..thanks

  36. Hi,
    I own a 2002 Mitsubishi l200 diesel 4d56, with a injector fuel pump p/n; MR577077 wich is an electronic control fuel pump, so my problem is that the pick up goes in to limp mode, and have a engine check light on, I read the trouble code and it show only one, 18, fuel pump speed sensor, my question is; is it posible to replace the fuel pump speed sensor on that specific fuel pump model? or any maintenance will fix my problem? didn t find much solution wise on the net!
    thanks for your help!

  37. My mazda 3 2006 goes into limp mode, obd scan read absolute manifold, baromtric presure and solenoid c electrical, already change the 2 sensors maf and baro dn transmision, after instaling the new, stil in limp mode.when scand same error code.. Pls help

  38. Hello,
    So I am having a problem with my Nissan Sentra 2010. I had my transmission replaced 2 years ago, now I am having a problem with going into limp mode while driving at the speed of 70 for longer than 45 mins. When driving 70 for 45 minutes I loss most of my acceleration. If I turn my car off wait 5 mins turn back on I can drive normal again. No lights come up and codes. I have changed can shaft sense and crackshaft hardness. What else could it be??

  39. Hello
    I bought a Mercedes C180 brand new, automatic gear. In less than two weeks it fell into limp mode on reverse. In another two weeks it fell into D2 limp mode. Restarting engine got me going. No display of any error. Mercedes garage cannot identify the problem. They do not find anything on the on board computer. The problem repeated 4 times but each time no warnings. Restarting after few minutes make the problem disappear. How can I have repeatability of the problem or recordings on the computer so that Mercedes can find a solution?

  40. Hello, so I have a 2007 bmw 328i, recently I was driving the car and felt a loss of power or a transmission slipping feeling and so I pulled over and parked. Later when returning to the vehicle it started fine but when I move the gear shifter thru all gears nothing engages, like the transmission doesn’t exist. So now the car will not move, it doesn’t even show signs of a glitch or communications between the dash or car and the transmission at all. after doing a little rooting under the hood I noticed the transmission cooling line out hose not fully connected. but other then that no signs of anything out of place. Is it possible to completely kill my transmission driving just a few blocks. I had hardly went 3 miles from my home for the first time all day and this issue happened. What do u think?

  41. I have a 2009 Acadia SLT 3.6 that was running like a brand new car, then my check engine light went on showing number 3 spark plug misfire. I went and bought spark plugs and the following day I put my OBD on the car at which time it showed 7 codes, (P2096 fuel trim) P0300 x 2. P0301. x2. P0302 x 2. I don’t understand what could of happen but I do suspect sugar in my gas tank would that do it? I’m desperate for answers.

  42. Hi 🙂 I had a few codes come up and I think I have solved the problem, but the car is still in limp mode. Do I need to reset and remove the codes before it will go out of Limp mode, or will it go out of limp mode automatically once the problem is sorted out?

  43. Hello,
    Thank you for the great article.
    We have a Mercedes Benz Vito 112cdi 2002. Shortly after its latest maintenance (changed air and oil filter and front left light unit), it started jerking for a few seconds at motor start and it’s been on and off going into limp mode (3000rpm / 100km/hr limit) with no engine light on. No idea if these two issues are related.
    Our garage has “fixed” the van twice – once by changing the vacuum hose to the turbo which seemed to have a hole in it, another time by changing the clutch pedal switch but to no avail… the limp mode still switches on. The garage can’t find any error codes. The garage says we should just do the quick fix every time it happens and we think they have no clue what else to look for. The quick fix we have is to stop the engine and start again but we’re not satisfied with this. Has anyone else had this issue, and if so, what would the advice be? Could it be something to do with the maintenance they did or something else?
    Jenny

  44. hi. everyone
    i’m facing with limp mode when i replace my electronic throttle body control
    i don’t know how to reset ecu and old memory.
    if i place back the old one.,the car was totally fine.

  45. I have a 2002 hyuandai Santa Fe with 165,500 miles I recently got a p0501 code and my trans went into limp mode when I press the gas hard it seems to brake against me and it also won’t go past 45 sometimes and once I drive it it won’t go past 20 just happened today when I got onto the highway

  46. Hi there. I’m really hoping you can help. I have a 2011 Toyota Highlander. The first time the car went into limp mode we replaced the throttle body. Two weeks later, the car went back into limp mode. After weeks of looking at the car, the mechanic had us replace the PCM in the car. A week later, the car went back into limp mode. The code is still saying error in throttle body.

  47. I have a Maserati 2016 went into limp mode the Maserati shop charged me 700 dollars for new spark plugs and the problem was fixed. I suspect that it was something else that was covered by warranty but they had to make some money off of me

  48. I have a 2011 Nissan Rouge in limp mode. Put it on a code reader and it came up a abs sensor issue in the right front passenger tire. Replaced the abs sensor. When I go to accelerate it looses power.. will the computer have to be reprogrammed?

  49. Anybody ever hear of a 2004 Hyundai Santa Fe going into limp mode with no check engine light. Will not run over 2000 RPM find a start up an idol go about a half a block goes into limp mode and won’t come out with no check engine light at all.I’ve been stuck for a week and I can’t find The problem any help would be appreciated

  50. I have a Nissan navara D40 YD25 turbo engine,I just replaced the turbo recently when on drive the engine lacks power.But works well on 2rd and 3rd gear power boost.

  51. I have a 2013 F150 3.5 Ecoboost with symptom of engine shaking (severely miss-firing?) and shuts down to about 30 mph. I also have a transmission reprogramming recall so took to dealer. They have not called me so I drove to the dealer. The service manager says they haven’t completed the diagnosis (it’s in their computerized diagnosis equipment and the mechanic is evaluating the information. They think it’s a lead rail in the transmission. Can I just take this to AAMCO TRANSMISSION? I Leary of their slow to give me an answer approach. Thanks Ed Barton

  52. I have an ’04 GMC Savanna 3500 with 6.0.
    The 4l80 trans shot craps at 360,000 miles after bad maintenance practices. so installed a rebuilt one from a wholesale rebuilder.
    The truck now goes into limp mode at start intermittently.
    The ABS light has been on since before replacing trans and it had thrown fuel injection codes before. Cleaned fuel injectors, cleared codes, no current codes but still goes into limp mode at start.
    The truck is now at the Transmission rebuilders shop where they say it’s an electrical issue they are tracing.
    Trying to get to the bottom of it as it’s my work truck.
    Any ideas?

  53. Got a caddy 2006 model 1.9tdi 6 speed manuel its doing limp mode whats the reason thats making that

  54. If you need answers to your car questions, it is much more likely that you will get answers in our car community. You can find our community here.

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