P0012moderate severityPowertrain
Intake Camshaft Position Timing Over-Retarded Bank 1
on 1997 BMW 528i 2.8L I6 M52 · RWD
What this code means
The intake camshaft timing for Bank 1 is more retarded than the PCM commanded position.
Symptoms
- Check Engine Light
- Loss of power
- Poor acceleration
- Rough idle
Common causes
- VVT solenoid failure
- Low oil pressure
- Oil passage blockage
- Timing chain wear
Diagnostic steps
- Check oil level and condition
- Test VVT solenoid
- Check oil pressure
- Monitor cam timing with scan tool
Repair notes
Replace VVT solenoid or clean oil passages.
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Other Powertrain codes on this vehicle
29CC
Misfire Cylinder 1
29CD
Misfire Cylinder 2
29CE
Misfire Cylinder 3
29CF
Misfire Cylinder 4
29D0
Misfire Cylinder 5
29D1
Misfire Cylinder 6
29D2
Misfire Cylinder 7
29E0
Lambda Additive/Idle Adaptation Limit, Bank 1
29E1
Lambda Additive/Idle Adaptation Limit, Bank 2
29E2
Lambda Multiplicative Part-Load Adaptation Limit, Bank 1