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?
Limp mode is a security function for your engine and transmission. When the engine or transmission control unit receives a very faulty parameter from the engine or transmission, the car will go into limp mode.
The limp home mode often reduces the power and limits the engine’s RPM to drive your car to a workshop without damaging the engine.
For example, if the 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 computer sets itself to limp mode, shuts off the turbo boost completely, and puts a max RPM limit to 3000 RPMs to be sure that you won’t blow or damage any engine parts.
Limp Mode Symptoms
The most common symptoms of limp mode are check engine light, reduced engine power, RPM limit, or stuck gear.
Here is a more detailed list of the most common symptoms:
1. Check Engine Light
The check engine light is probably 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 one. Here is a more detailed list of the most common symptoms of limp mode:
If the check light is on your dashboard, it is definitely time to check the trouble codes with an OBD2 scanner.
A check engine light can show up because of hundreds of different symptoms so therefore you can’t just guess the issue, you have to diagnose the check engine light properly with an OBD2 scanner.
2. Reduced engine power
This safety 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, usually obliterate the turbo pressure.
3. RPM limit lowered
Another safety feature that your engine control unit uses when setting your car into limp mode is lowering the RPM limit heavily. It is definitely in Limp home mode if you realize that it is impossible to rev over 3000 RPM in your car.
4. 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, 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?
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 causes.
1. Engine boost control problems
The most common cause of limp mode is boost-control problems. This can be 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
Another common cause is faulty engine sensors. The engine has many sensors that can cause your car going into this mode, so it is not 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 result in limp mode are MAF sensor, engine temperature sensor, boost pressure sensor, or O2 sensor.
3. Transmission Issues
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 a bad shift solenoid.
4. Wiring Issues
Wiring issues to the engine or the transmission are also pretty common when it comes to this mode. It can be a broken wire or just corrosion at a connection.
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?
Fixing this mode often requires a full diagnosis to prevent just replacing parts and washing money down the drain.
However, there are some easy and mostly free things you can try at home to try. It is not sure that it will make any difference, but you have nothing to lose by it either!
1. Check All fluids
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
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 result in 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
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
If you checked everything above without results, there is nothing more to do than make a proper diagnosis not 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
The limp mode can be caused by many things. This means we cannot just replace things and hope for the best of luck. To diagnose limp home 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 the car.
- Connect an OBD2 scanner and check the trouble codes. When limp home 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.
- 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.
- 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.
- Check for intake leaks with an EVAP smoke machine. Repair any possible leaks or replace a faulty PCV valve .
- Check the MAF sensor values, O2 sensors, engine coolant temperature sensor, throttle position sensor, and air temperature sensor. Replace if faulty.
FAQ
How do you fix limp mode?
The easiest way to fix this mode is to check what is going on in your car with an OBD2 scanner. If it just happened, you can try to remove and insert the car key to restart the car to see if it fixes the limp situation.
Can I drive my car in limp mode?
The limp mode should not be ignored. If you notice that your car has gotten into this mode, fix it as soon as possible. This mode is designed so you can drive the closest way to a workshop to fix the problem.
Don’t drive around with this unnecessary.
How many miles can you drive in limp mode?
There is no fixed amount of miles or km you can drive with limp mode. I do not recommend driving more than to the repair workshop when it appears.
Can a bad battery cause limp mode?
A bad car battery can absolutely cause limp mode. Low voltage can create many strange problems with your car’s electronic computers, and this mode is one issue.
How much does it cost to fix limp mode?
The limp mode can be caused by many vehicle problems, which also means it can cause many repair costs. Usually, you can expect a repair cost of 50$ to 500$, but sometimes it can be way more expensive if you are unlucky.
Can low engine oil cause limp mode?
Low engine oil does not cause limp mode just by itself. However, low engine oil can create low oil pressure, which can cause the hydraulic lifters to get empty on oil or the camshaft chain tensioner. This can, in return, cause this mode.
Can bad spark plugs cause limp mode?
Bad spark plugs will most often cause misfires, and misfires will trigger the check engine light. You will just experience a check engine light in most vehicles when the misfires occur. However, in some car models, you may experience limp mode because of misfires.
Can you Bypass Limp mode?
There is not really a way to bypass limp mode other than repairing the issue. In some cases, you can reprogram the car to remove the damaged sensor from the system if possible, but it is not a recommended way to do it. The best way is always to repair the issue.
Trenda york
Hi i have a 2010 chevy equinox 2.4L and just put an engine in and now car is going into limp mode it start up and drive fine then it goes into limp mode and these are the codes that i get now that i didn't have before putting engine in c027b, c0800, c1100, u0100, c0040, p0089, p0420, p0010 an P228d where to start please help me i have already spent so much money already.
Randy Hickey
Hi, Having limp mode problem with 2010 Mazda CX7. Showing codes P2100 and P0220. One code relates to the throttle position sensor and the other to the accelerator pedal. I have removed the pedal and tested. I have removed the throttle body, inspected sensor and cleaned. Then did a relearn with same results. Tried erasing the codes to no avail (says permanent codes). Removed ECM, opened and inspected good. Basically, it seems to be an intermittent issue. Sometimes I'll start it up and take it for a spin with no issues at all but then sometimes it starts up and goes right into limp mode (very low RPM's and will barely drive). Oh and it also has an O2 sensor code which I haven't bothered to look at. I tend to let all O2 sensor codes go by the wayside nowadays since they are so recurrent they have become more trouble than they are worth in my opinion.
Rochelle
Got a caddy 2006 model 1.9tdi 6 speed manuel its doing limp mode whats the reason thats making that
Chuck
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?
Ed Barton
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
Michael Hauley
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.
Robert Pallas
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
Margie
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?
Tim Young
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
Lauren
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.
Jordan steffy
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
phyo
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.
Jenny
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
Ann
Can my car be in limp mode without engine light on
Vicky
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?
Martin Stagi
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.
Jessica
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?
Aniyan
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?
Ricky
My Mercedes had this problem and it was the conductor plate in the transmission. Sometimes on Mercedes it’s caused by the shifter assembly or the gas pedal assembly
Melissa Caride
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??
Peejay
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
Claude
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!
ALAN
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
Zainool Khan
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
Shane
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???
Bornface Chishimba
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?
Musyani
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?
Magnusua burgess
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
Janet Scovell
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?
Larry
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
Christian
Is there any way the cold start switche can affect the acceleration of the car
Ayobami
What are the common reasons why electric throttle pedal fail to respond
Shan
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.
Diego
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
Adam
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!!
Edwin Hernandez
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.
Joseph Moselelane
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.
Joe Tursi
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!!!
Apsha
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.
Stan
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
Livhuwani Tshivhase
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
Magnus Sellén
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.
Steve
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
Magnus Sellén
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.
Jrnnifer
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?!!??
Magnus Sellén
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.