You’re cruising down the road, pressing the gas pedal, but the car barely moves. The power’s gone, and no matter how hard you try, it just won’t respond. You pull over, shift into Park, and realize the problem: your car is stuck in limp mode.
But what exactly is limp mode, why does it happen, and how much will it cost to fix it?
In this guide, we’ll break down what limp mode means, how to recognize the symptoms, and the most common causes behind it. We’ll also share simple fixes and a few tips to keep your car from going into limp mode again. Let’s get into it.
In This Article:
What Is Limp Mode?
Limp mode is a built-in safety feature that protects your engine and transmission when something goes wrong. When the engine control unit or transmission control unit detects a problem, it switches your car into limp mode to prevent further damage.
In limp mode, the car limits power and caps the engine RPM so you can still drive it safely to a mechanic without risking serious engine problems.
For example, if the engine control unit detects that the turbo boost pressure is reading 2.0 bar when it should be no more than 1.3 bar, it sees that as a potential threat to the engine. To protect the system, the computer steps in and activates limp mode.
Many drivers ignore the check engine light when it first appears. To prevent further damage, the ECU takes control by shutting off turbo boost completely and limiting engine speed to around 3000 rpm. This keeps you from over-revving or damaging internal components until the issue is fixed.
Limp Mode Symptoms
The most common sign of limp mode is the check engine light glowing on your dashboard. You’ll also notice that the car suddenly loses power and won’t rev as high as usual. In automatic cars, the transmission may stop shifting into higher gears to protect both the engine and transmission.
Here’s a closer look at the most common symptoms that tell you your car is in limp mode.
1. Check Engine Light
The check engine light is usually the first warning you’ll see when your car goes into limp mode. It may come on together with an EPC light or another warning, depending on your vehicle.
Keep in mind that a check engine light can appear for many other reasons, too, so its presence alone doesn’t always confirm limp mode.
If the light is on, use an OBD2 scanner to read the fault codes. That will tell you what triggered the light and whether limp mode has been activated.
RELATED: Check Engine Light – Meaning, Causes (& How to Fix It)
2. Reduced engine power
One of the clearest limp mode symptoms is a noticeable loss of power. When this happens, the engine control module limits power output to prevent serious damage.
In turbocharged engines, the ECM usually completely cuts off the boost pressure. Even in non-turbo engines, power will be restricted to protect key components.
3. RPM Limit Lowered
When limp mode is active, the ECM limits your maximum RPM. If your car refuses to rev past a certain point, usually around 2500 to 3000 RPM, that’s a strong sign you’re in limp mode.
This limiter keeps you from pushing the engine too hard while it’s in a protected state.
4. Stuck In Gear
If your vehicle has an automatic transmission, another sign of limp mode is being stuck in one gear, usually third. You might notice this if your engine is revving high on the highway, but the transmission won’t shift up.
A locked transmission combined with a low rev limit is a sure sign that the car has entered limp mode.
Limp Mode Causes
The most common causes of limp mode are boost pressure problems, faulty sensors, transmission issues, and wiring faults.
Here’s a more detailed look at what can trigger limp mode.
1. Turbo Boost Pressure Problems
The number one cause of limp mode is incorrect turbo boost pressure. If the pressure is too high, the car activates limp mode to protect the engine. Low or inconsistent boost can also trigger it.
Common causes include a faulty turbocharger, wastegate, boost pressure sensor, boost control valve, or a boost leak in one of the pipes.
2. Faulty Engine Sensors
Modern engines rely on many sensors, and any one of them can cause limp mode if it sends incorrect data.
Common offenders include the MAF sensor, MAP sensor, boost pressure sensor, engine temperature sensor, and O2 sensor.
The best way to find out which one is bad is to scan for fault codes and check live data readings.
3. Transmission Issues
If your car has an automatic transmission, limp mode may be triggered by transmission problems.
Low fluid levels, a bad shift solenoid, a faulty valve body, or a damaged sensor can all cause the ECM or TCM to activate limp mode.
Always check the transmission control module for trouble codes before replacing any parts.
4. Wiring Problems
Modern vehicles depend heavily on electronic wiring. Damaged or corroded wires can disrupt communication between sensors and control modules, causing limp mode.
Finding a wiring issue can be tricky, so it’s best to diagnose the car properly before tearing into the harness.
How To Fix Limp Mode
To fix limp mode, you’ll need to diagnose the root cause. Avoid guessing or replacing random parts, as that can get expensive fast.
If you want to try a few simple checks before visiting a mechanic, start with these steps.
1. Check All Fluid Levels
Begin by checking all fluids: engine oil, coolant, power steering fluid, brake fluid, and, especially, transmission fluid in automatic cars.
Make sure the fluids are clean, topped up, and replaced according to your car’s service schedule.
READ MORE: 11 Car Maintenance Tips (Extend the Life of Your Car)
2. Clean the MAF Sensor
The Mass Air Flow (MAF) sensor measures air entering the engine. If it’s dirty, it can send wrong readings and cause limp mode.
Remove the sensor and gently clean it with an electronics cleaner. Never touch the sensor element with your hands or a cloth.
RELATED: 8 Symptoms of a Bad MAF Sensor (& Replacement Cost)
3. Check or Replace the Air Filter
A clogged air filter can also trigger limp mode. If it’s been a while since you changed it, inspect the filter and replace it if it’s dirty.
Most air filters are inexpensive and easy to replace, and a clean one keeps the engine breathing properly.
RELATED: How Often Should You Change the Engine Air Filter?
4. Check Trouble Codes
If you still can’t find the cause, connect an OBD2 scanner and read the stored trouble codes.
You can either visit a mechanic or buy an affordable scanner to use at home. Reading the trouble codes is the fastest way to know exactly what’s wrong.
5. Talk to a professional
If you’ve done all the basic checks but can’t fix the problem, it’s time to visit a professional mechanic.
They can run advanced diagnostics, test components, and pinpoint the exact cause. It might cost more upfront, but it saves you money in the long run.
Also, check if your vehicle has any recalls related to limp mode. Sometimes the fix can be done for free. You can check it in our VIN decoder.
How to Diagnose Limp Mode
A full diagnostic test is the best way to figure out what’s causing limp mode. Here’s how a mechanic would typically go about it:
- Connect an OBD2 scanner and read all stored trouble codes. Limp mode always triggers at least one code.
- Research the code and follow the troubleshooting steps based on that specific issue.
- Check boost pressure readings with a scan tool to ensure they’re realistic at idle and under load.
- Inspect the wastegate using a pressure or vacuum gauge. Verify that it moves freely.
- Test the boost control sensor by monitoring it during pressure or vacuum testing.
- Check for intake leaks using a smoke machine. Repair any leaks or replace a faulty PCV valve.
- Inspect key sensors like the MAF, O2, coolant temp, throttle position, and intake air sensors. Replace any that give inaccurate readings.
If none of these tests reveal the issue, it’s best to let a professional mechanic take over.
FAQs
You can drive your car in limp mode, but it’s not recommended. Limp mode is only meant to get you safely to a repair shop. Driving long distances while in limp mode can cause more damage to your engine or transmission.
There’s no fixed number of miles you can drive in limp mode. You should only go far enough to reach a safe location or a trusted mechanic. The longer you drive in limp mode, the higher the risk of further problems.
Yes, a bad battery can cause limp mode, though it’s not very common. A weak battery or low system voltage can make the engine control module act up and trigger limp mode.
The cost to fix limp mode depends on what caused it. It could be free if it’s just a loose connector, or it might cost more than $3000 if major parts like a turbocharger have failed.
Low engine oil can cause limp mode indirectly. Low oil levels lead to low pressure and mechanical issues that may trigger limp mode to protect the engine.
Yes, bad spark plugs can cause limp mode, but it’s uncommon. Faulty plugs can cause misfires and poor performance, which may eventually trigger limp mode if left unchecked.
You can’t truly bypass limp mode. The only real way to get out of limp mode is to fix the problem that caused it. Once repaired, the system will return to normal operation.
To reset limp mode, repair the issue that caused it first. The system often resets itself afterward, but you can also use an OBD2 scanner to clear the fault codes and restore normal performance.
Conclusion
Limp mode may be frustrating, but it’s actually a smart safety feature designed to prevent serious damage to your car. Take it seriously and diagnose the problem as soon as possible.
In many cases, fixing a loose sensor connection or cleaning a dirty MAF sensor is all it takes to get your car running normally again.
If you’re unsure or the issue keeps coming back, don’t push your luck. Visit a professional mechanic and have the system checked thoroughly. A quick repair now can save you from much bigger repair bills later.
References:
Federal Motor Vehicle Safety Standards; Accelerator Control Systems
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
Can my car be in limp mode without engine light on
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?
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.
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?
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?
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??
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
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!
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
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
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?
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?
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
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?
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
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?
Is there any way the cold start switche can affect the acceleration of the car
What are the common reasons why electric throttle pedal fail to respond
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.
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
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!!
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.
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!!!
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.
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
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
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.
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
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.
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?!!??
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.
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?
You might have to erase the trouble codes with a scanner or remove one battery cable for 10 minutes to reset the control units!
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!
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!
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
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.
I have a mitsuibusi i turbo (2008) which goes into limp mode.
Read the trouble codes to find the problem 🙂
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??
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.
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
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.
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?
@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.
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!
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.
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?
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.
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
@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 🙂
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.
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!
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!!
@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 🙂
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.
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?
@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.
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 :/
@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!
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?
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?
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
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
Hello Clinton I have this same problem and i replaced the whole ecm and its still stuck in limp mode. 07 navara
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
I have replaced the ega valve but still goes into limp mode what could be causing it
Is there inning one that can help me with a scanner labtop.
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?