[buly34]

I recently started having weird startup issues and occasionally at idle the RPM's would dip down or jump. Also had it stall on my a few times. Now when driving I am getting these codes...

P2A9A
P2A9E
P2AA0
P3100

I replaced my intake CPS and both VANOS solenoids about 8 months ago. Does anyone know what the issue could be? Once I restart the car is issue goes away then eventually happens again.

Thanks in advance!

[X_Drive]

Your intake camshaft sensor seems to be on the fritz. Try swapping the intake side with the exhaust side and see if the fault codes migrate to the exhaust side. Real easy to do if you have an E8 torx socket and time. If the fault migrates or changes to 2A9B/2A9F/2AA1 then you know that the sensor is faulty. If the fault stays, you may have a VANOS adjustment unit issue.

HTH's

[buly34]

Originally Posted by X_Drive

Your intake camshaft sensor seems to be on the fritz. Try swapping the intake side with the exhaust side and see if the fault codes migrate to the exhaust side. Real easy to do if you have an E8 torx socket and time. If the fault migrates or changes to 2A9B/2A9F/2AA1 then you know that the sensor is faulty. If the fault stays, you may have a VANOS adjustment unit issue.

HTH's

Thanks for the information. I'll try to swap them sometime this week, hopefully it's just the sensor!

[buly34]

Originally Posted by X_Drive

Your intake camshaft sensor seems to be on the fritz. Try swapping the intake side with the exhaust side and see if the fault codes migrate to the exhaust side. Real easy to do if you have an E8 torx socket and time. If the fault migrates or changes to 2A9B/2A9F/2AA1 then you know that the sensor is faulty. If the fault stays, you may have a VANOS adjustment unit issue.

HTH's

Swapped them out and the issue followed to the exhaust side! Any idea if the 3rd party brand sensors work? I found some for around $40

[mweisdorfer]

Originally Posted by X_Drive

Your intake camshaft sensor seems to be on the fritz. Try swapping the intake side with the exhaust side and see if the fault codes migrate to the exhaust side. Real easy to do if you have an E8 torx socket and time. If the fault migrates or changes to 2A9B/2A9F/2AA1 then you know that the sensor is faulty. If the fault stays, you may have a VANOS adjustment unit issue.

HTH's

Agreed. You have two camshaft position sensors; intake and exhaust. You should replace them in pairs.

[mweisdorfer]

Originally Posted by buly34

Swapped them out and the issue followed to the exhaust side! Any idea if the 3rd party brand sensors work? I found some for around $40

Beck and Arnley is not a bad choice for an aftermarket brand.

http://www.beckcatalog.com