Hi, We just replaced valve cover gaskets on 2007 E66 N62. All seemed to go normal except now we have the DTC 2A90 and rough idle due to VANOS.
JA: Is the rough idle consistent or more erratic? How many miles are on the car?
Customer: Actually I was not finished, accidentally hit enter. So far we have swapped sides of both cam position sensors, VANOS solenoid valves but the 2A90 code for the right bank exhaust cam remains. I have also found information to check if the cam adjuster is locked when engine
is off. I have not yet checked that. Also, I have reviewed the BMW TSB to replace 4 cam position sensors & crank position sensor. Wow that about $600 in parts just to try? At this point I would welcome an experienced opinion. Thanks, Josef
JA: Are you hoping to fix this yourself?
Customer: Yes, I am a repair facility.
JA: Great! What have you tried so far?
Customer: It's in previous text.
JA: Is there anything else important you think the BMW Mechanic should know about your BMW?
Customer: That's the only issue. DTC 2A90
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the BMW Mechanic about your situation and then connect you two.