Originally Posted by Dr Zoidberg
The dealer called, the car is done,
a brief summary , I will know more once I speak with the mechanic ,
they found several codes pointing to a stuck-open thermostat- it was replaced under CPO
They found several codes pointing to a vanos issue.
The screeching noise they said came from the vanos motor. ( what!! )
after troubleshooting the issue by swapping out the vanos motor and sensors, they found a faulty eccentric shaft sensor. and that was causing both the noise and the idle/drivability issues
A couple concerns
I dont understand how this sensor failure could cause the VANOS motor to squel/screech like that, but I do understand now why it was not happening under throttle.
I also dont understand that if the motor was screeching that bad , how nothing in the motor was not damaged. As I am guessing the eccentric shaft sensor was telling the motor to go beyond its limits?? no idea ?
Any help with this would be great.
I assume you mean done as in fixed? Not like dead? hope it worked out.