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So, I am reaching out to the interwebian-forums for some help. 2 garages have told me it is a VANOS cam gear failure and my issue requires an insane amount of work (ie: cam gears/sprockets and timing chains) The car is a 2013 M5.
I am getting the following codes:
131401 - “Variable camshaft timing control (VANOS), exhaust, cold start not controllable”
120408 - “Charging pressure control: Switch-off as consequence”
120908 - “Charging pressure control 2: Switch-off as consequence”
These trip within the first 30 seconds of the car being started “cold.” The idle increases to 2000rpm and hunts around as the VANOS system looks for its adjustment. (Escentric shaft motor tested and gets to its limits). The car then settles down into an awful idle, and stays running although a little “high.” After letting the car warm up, oil get to temperature, you can shut down the car, clear the codes out of the system, and then restart and it’s 100% happy and fine. Pulls like a freight-train and is happy. So it’s a cold-start issue. Weird right? So, before tearing into an engine and spending 8-10k on it, does ANYONE have any idea as to the problem?
New VANOS solenoids
New spark plugs
New coils
Engine flushed 3x liquid moly
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