Unexplained Limp Mode

Silo

Apparently there are at least TWO types of unexplained limp modes, characterized by

a. high idle and limited power (throttles not opening fully)
b. rev limiter at 3500rpm

Common to both is that there is no CEL and no DTC, and they "reset" by restarting the car. I have also heard for instance a. that although no CEL/DTC is shown, doing a DTC clear/reset (with any kind of OBD tool) while car still idles high will reset the limp mode and car will operate normally again. Kind of a "phantom DTC" so to say.

Are all of you that experienced one or the other issue running flashed ECUs? Please specify which reflash and limp behaviour you had.

steve216

Got this problem this week. I first got the service engine soon warning and then was limited to 2500 rpm. I checked fit codes and had p0011 and p0300. I reset them and drove for a mile and they came back. I went for an oil change and reset it again. Now the service engine soon doesn't come back and now I'm limited to 3500 rpm. Still pulling the same codes thought.

AWIZRD

I've been running into this just about everyday now.... Here's the scenario

1. Drive to work in the AM ( about 59 degrees out ) - Car runs great
2. Park car under covered parking for 8-10 hours
3. Start car ( about 55-65 degrees...weird temps in Phoenix lately) - startup is fine.
4. Brief idle
5. Push accelerator pedal and only get about 25% throttle.
6. Mash to floor and leave it there...R's come up but VERY slowly - a couple thousand rpm
7. Shut car off, restart, repeat....
8. Usually about the third or 4th time, she comes alive and voila all is well until the next morning when we proceed with step 1 again

NO CEL, NO CODES, Nissan dealership can't recreate so they can't fix anything

Ideas?

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1967 Mustang (ProStreet BBF, 600+ HP)
2001 Porsche 996TT (Sold)

GuiLLoZ

It takes me about 3 to 4 times to start up to completely erase the limp mode sometimes the code that appears is 10b which is the mafs. It does go on when im driving on a uphill and on a high gear the car is making too much effort for too long without me down shift. About 97% after that the next start up begins on the limp mode. In my opinion it all has to do with the stock tune and how close the parameters of that mode are set. so i just down shift and make the ride more fun anyways ive been 3 months limp mode free

darkphantom

Dang, never thought I would experience it out of nowhere but the dreaded "half-***-limp-mode" has struck me!

I am experiencing ALMOST EXACTLY what you are except it is my first time.

I restarted off the highway, still in limp.

Drove home, restarted, it went away but something felt off. My exhausts seemed a bit more quiet and the tranny was shifting a bit strange, like almost a bit "slushy" feeling.

I went out again tonight, seemed like she had power but still felt a bit off. I will try the stealership tomorrow and see what happens.

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'13 PW M6 | Takeda | ARK GRiP V2 | H&R

darkphantom

Drove to the stealership for an oil change, they could not diagnose the issue! The tech "reset" the car...whatever that means. Car feels the same, power is there-ish but it just feels muffled someway.

Maybe I need to clean the MAFs and the TBs?

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'13 PW M6 | Takeda | ARK GRiP V2 | H&R

haitech

My friend hits limp mode when he turns on his headlights. ... being serious here

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darkphantom

I need to take a look at the TBs and the MAF....blah. Will have to drive to my parents to use their garage >_<

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'13 PW M6 | Takeda | ARK GRiP V2 | H&R

grobie

Just had the same problem with the so-called limp mode. The day before this happened, I had removed my air filters and washed them out (Nismo Cold Air intake Long tubes). I left them out to dry overnight and installed them the next morning. Went to the post office (Approx 5 miles), car drove fine. Left the post office after about 3 minutes and the car started bucking back and fourth when trying to give it a little throttle. Had to drive home at 20 to 25MPH, car would not go over that. Got it in the garage and tried to rev it in neutral...still would not rev. Car sat overnite, then started the next morning and took her out for a drive...and no issues. Car was fine. No DTC's, lights, etc... Only thing I can think of...is that the filters were not completely dry and she wasn't getting enough air, or somehow moisture worked it's way up the the MAFS and was causing issues??

juld0zer

Jerking and bucking sounds like dirty or contaminated MAF/s to me. Clean both MAF sensors using the correct cleaner aerosol and then do a battery reset and go for a drive.

batboyvaj

Do all of the people that are having issues have an aftermarket intake?

grobie

Will give it a try. Have not had the issue come back so far....Keeping my fingers crossed!

juld0zer

For me, i did have the Stillen G3 fitted at the time but i had it on for ages before it started happening. In the end, it was a bug in the throttle map i had loaded with Uprev. My guess is that under the right circumstances, that buggy cell would be called up and the ECU doesn't like it so it reverts to failsafe.

It doesnt log any fault or bring on the engine light because to the ECU, everything is working as it should. The bug probably just calls for an invalid command, like an off the scale response.

darkphantom

Yes, Takeda CAI on mine. However, problem has not gradually built up - just one day all of a sudden.

I reset the battery and it felt like it did before for a bit but then went back to the normal "post-limp" feeling. I have had not any time to look at the TBs or the MAFs so that is on my list. I'll also take a look at the filter to make sure nothing is stuck there.

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'13 PW M6 | Takeda | ARK GRiP V2 | H&R

BossJ

New poster here. I usually just lurk, but I just had this happen to me the other day.

On the interstate, only had the car (2013 touring sport - 22k miles) on for about5 mins, was going to pass someone - I was going around 65 and the car felt super sluggish. Put pedal to floor and crawled during acceleration. Would go higher in speed but felt like I was in 6th gear at 15mph, ... Turned car off. Turned it back on 10 minutes later, no issues.

Power came back.

Took to dealership for oil change. No codes, couldn't repeat it.

Edit: also, the dealership said, most of the time this happens because the brake sensor or whatever is being triggered. So next time it happens pull up in the brake and see if that fixes it.

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2016 Pearl White 370Z Nismo (6ma) || Z1 CAI || Greddy GT X || FI Resonated Test Pipes || Ported Manifolds || Fuel Pump: aem50-1200 || 1050cc Fuel Injectors || E85 || RJM Performance Clutch || ECUTECH - SpecialtyZ (Seb)