P0015
HighP0015 — Exhaust Camshaft Timing Over-Retarded (VANOS, Bank 1)
Description
What the Code Means
P0015 flags an over-retarded exhaust camshaft phase: the DME has detected that the actual camshaft position doesn't match the target. The VANOS system changes valve timing using oil pressure, controlling camshaft position through a solenoid. Any deviation — a sticking exhaust camshaft solenoid, low oil pressure, or a worn mechanism — causes the mismatch and sets the code.
Symptoms
Symptoms
- Power loss, sluggish acceleration.
- Rough idle.
- Increased fuel consumption.
- Check Engine light on.
Causes and fixes
Diagnosis and Repair
- Read fault codes with a scanner (ISTA, INPA).
- Check engine oil condition and level — low oil pressure directly affects VANOS operation.
- Measure the exhaust camshaft VANOS solenoid resistance with a multimeter.
- Clean the solenoid of debris or replace it (OEM part number
11367579071). - Check the VANOS actuator for wear.
- Reset DME adaptations after the work is done.
A common diagnostic mistake is replacing the actuator without checking the solenoid and oil pressure: a stuck solenoid is the more frequent cause of this code.
Possible secondary damage
Secondary Damage
Ignoring the code can lead to solenoid coking, oil pressure loss, and VANOS actuator damage — repairs get significantly more expensive at that point, so don't put off diagnosis.