P1523moderate severityPowertrain
Variable Valve Timing Over-Retarded Bank 2
on 1999 BMW 540iT E39 4.4L V8 · RWD
What this code means
The DME detected that the variable valve timing on Bank 2 is more retarded than the commanded position. The VANOS system cannot advance the camshaft to the target position.
Symptoms
- Check Engine Light
- Loss of low-end power
- Rough idle
- Poor fuel economy
Common causes
- Worn VANOS unit
- Low oil pressure
- Dirty engine oil restricting oil flow
- VANOS solenoid sticking
- Timing chain stretch
Diagnostic steps
- Monitor VANOS commanded vs actual position
- Check oil level and condition
- Test VANOS solenoid response
- Measure oil pressure
- Inspect timing chain tension
Repair notes
Service VANOS system and ensure oil is clean with adequate pressure.
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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
P0012
Intake Camshaft Position Timing Over-Retarded 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