P0012moderate severityPowertrain
Intake Camshaft Position Timing Over-Retarded Bank 1
on 2021 BMW 840i 3.0L Turbo I6 · 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.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0016
Crankshaft Position/Camshaft Position Correlation Bank 1 Sensor A