adolzero

i'd like to ask some suggestion on the error code i had with my 2012 c63


i got a "f" from xentry diagnose report and it through a code "0204“ which said i didnt perform throttle valve actuator adjustment at idle speed position (sorry it was in Chinese and my translation is not perfect)






i didnt take care of it until yesterday i finished maintenance A the same code was reported and now it is a capitalized "F", i asked my dealer to do a detail check as below image:


it seems there is problem M16/4 (rear throttle valve actuator ) when engine is off but when i pull full gas pedal the red triangle becomes green and my dealer told me it looks fine. he upgrade my control unit version and try to delete the code but not succeeded.

i was told that keep monitoring my car in case any problem.

mods on this car: gruppem raw intake with kn filter; akrapovic evo exhast

after i modified my intake, sometimes when i have a cold/warm start the sound like BOOOM(normal) but sometimes it sounds like BUuuBOOM(a separated startup sound) - everything after is the same, the car works perfectly , not sure if that matters.

adolzero

let me know your thoughts.thx