P0015 Error Code

[jeep]

Hi Folks,

The Check Engine light came on the car on Friday. It then went away, but came back again. I checked the fault code using the "Torque" app and it gave me the error code P0015, "Camshaft Exhaust Position Sensors Timing Over Retarded", which from my research can be caused due to various reasons:
1. CAM sensors gone bad
2. VANOS Solenoids either need cleaning or need to be replaced
3. VANOS seals need to be replaced.

Needs the BMW diagnostic tool to get more details on the fault, hence will be taking it to an Indy.

I have had solenoid fault before where cleaning them had fixed the issue.

Has anyone else experienced the same fault code P0015. If so what was the cause of the fault, how was it fixed and how much did it cost? I want to be educated before I sign the check.

Thanks