2A7C on my 2011 328
Hi there, - came across this thread after Check Engine wen off with 2A7C.
After a couple of days of dealing with shaky start and subsequent code, I decided to double-check VANOS solenoid connectors, - I was doing valve cover
three days before.
Well, it turned out the connectors were crossed (these two actually the only ones you can make a mistake on, out of the entire car).
Aftre swapping connectors and clearing the code, the car runs fine!
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