Quote:
Originally Posted by Guibibi
Sorry to revive an old thread, but did you or someone else had this problem and fixed it? Just bought my car and it does the same thing and it is driving me crazy!
|
I did have 2C56 code. According to the N55 diagnosis handbook:
Potential problem source(s):- Boost-pressure sensor is defective or has been tampered with- Electropneumatic pressure converter in wastegate valve is defective- Wastegate valve is defective
I changed my cracked stock charge pipe to VRSF CP, and MAP sensor on the charge pipe. The code never appears again. But now I have 2C57 (half engine light when WOT around 80mph or above), which may be the pressure converter. I'm gonna change it next week to see what happens.
BTW, if you wanna keep your out-of-warranty BMW for another couple of years, I suggest you invest an OBD reader for BMW. It can read and parse code in the DME (invisible to general OBD readers).