[f30al]

I’ve got a 2017 340i tuned with MHD OTS stage 2 and I’ve been using the flex fuel option with a TU fuel pump running E40. I’ve been running this for about 6 months with no issues until recently.. Last weekend I had drivetrain malfunction pop up and the engine was bucking very briefly. I assumed it was fine since it went away and there was no CEL. Now this morning I had a CEL pop up as well as drivetrain malfunction on the idrive screen. I checked the error codes and saw 4 active codes and a new shadow (inactive) code. I took it for a drive around the block and it would not let me go over 2 PSI of boost and the exhaust also sounded louder than normal... If anyone is familiar with these codes and can tell me about them and how I should troubleshoot please let me know. Any help is greatly appreciated.

[Fast_Rabbi]

Did you touch your wastegate arm ?

[f30al]

I did not

[Fast_Rabbi]

Delette and see if that come back first.
If same code came back, your wastegate need to be adjusted.

[Aldor27]

Originally Posted by f30al

I’ve got a 2017 340i tuned with MHD OTS stage 2 and I’ve been using the flex fuel option with a TU fuel pump running E40. I’ve been running this for about 6 months with no issues until recently.. Last weekend I had drivetrain malfunction pop up and the engine was bucking very briefly. I assumed it was fine since it went away and there was no CEL. Now this morning I had a CEL pop up as well as drivetrain malfunction on the idrive screen. I checked the error codes and saw 4 active codes and a new shadow (inactive) code. I took it for a drive around the block and it would not let me go over 2 PSI of boost and the exhaust also sounded louder than normal... If anyone is familiar with these codes and can tell me about them and how I should troubleshoot please let me know. Any help is greatly appreciated.

Possibly the wastegate arm hitting the downpipe v band (that could be preventing you from making more boost)? Maybe the downpipe v band came undone slightly causing exhaust to leak out from the hotside of the turbo to downpipe?

[Aldor27]

Originally Posted by f30al

I’ve got a 2017 340i tuned with MHD OTS stage 2 and I’ve been using the flex fuel option with a TU fuel pump running E40. I’ve been running this for about 6 months with no issues until recently.. Last weekend I had drivetrain malfunction pop up and the engine was bucking very briefly. I assumed it was fine since it went away and there was no CEL. Now this morning I had a CEL pop up as well as drivetrain malfunction on the idrive screen. I checked the error codes and saw 4 active codes and a new shadow (inactive) code. I took it for a drive around the block and it would not let me go over 2 PSI of boost and the exhaust also sounded louder than normal... If anyone is familiar with these codes and can tell me about them and how I should troubleshoot please let me know. Any help is greatly appreciated.

As for the 11C004, check your hpfp pigtail connector. Could be loose, unplugged, or severed. I've dealt with setting the electronic wastegate more times than I'd like to admit so lmk if you need help. Kevin's video helped me a ton. https://www.youtube.com/watch?v=BGLL...hannel=kern417

[f30al]

Originally Posted by Aldor27

As for the 11C004, check your hpfp pigtail connector. Could be loose, unplugged, or severed. I've dealt with setting the electronic wastegate more times than I'd like to admit so lmk if you need help. Kevin's video helped me a ton. https://www.youtube.com/watch?v=BGLL...hannel=kern417

I sent you a private message