Originally Posted by wind.zero

2011 NISMO with GTM Stage 1 SC w/custom tune

I have encountered limp mode 5 times over the span of about 3-4 months. I opened a thread in the tuning section a while back but did not get a lot of responses.

Has anyone else who is FI'ed gone into limp mode and what was the cause? I have an appointment this Friday with the shop to troubleshoot but I am asking for advice from the forum as well. My shop and I initially thought this was a clutch related issue, but now leaning towards an erratic MAF reading.

Limp Mode #1
This was on a 2nd to 3rd shift, full throttle, and instant limp mode, happened on a ramp entering the freeway. Pulled over and on a restart, the car was fine and I drove on.

Limp Mode #2
This was also a 2nd to 3rd shift, full throttle, passing a slow moving car, also happened on a ramp entering the freeway, limp mode instantly on the shift. Pulled over and after several restarts the car was fine.

Limp Mode #3
This was a 3rd to 4th shift, full throttle, merging onto a freeway. Pulled over and it took several restarts before the car would rev normally.

Limp Mode #4
My tuner was able to duplicate the problem last Friday while doing several different shift combinations and full throttle accelerations. He initially thought it was clutch related, but there is very little if any slip. He suspects something causing an erratic MAF reading or some other sensor.

Limp Mode #5
This one happened on the commute home today. I was full throttle in 4th at about 6.5k, the revs hit a wall and stopped. I was in limp mode. I pulled over and on a restart the car was fine all the rest of the way home. This is the first time I hit limp mode and was NOT shifting the gear box. This time happened under full throttle acceleration only.

I am NOT getting a CEL, but Cipher pulled this code:

-------- ECU --------

One code found!
**********
P006A

This code is MAF related. I am going to log the commute home tomorrow and hopefully get an entire log when it happens if I can duplicate it again.

I appreciate any ideas on a fix.