The DME detected an electrical fault in the Bank 1 intake camshaft adjuster (VarioCam oil-control solenoid) circuit.
SYMPTOMS
- Check-engine light
- Rough idle
- Reduced power
- Possible hard start
- Slight economy loss
LIKELY CAUSES
- Failed camshaft oil-control valve / VarioCam solenoid
- Wiring or connector fault
- Low or dirty engine oil
- Clogged oil galleries to the adjuster
DIAGNOSIS STEPS
- Read live cam-adjustment data with a Porsche-capable tool
- Check oil level and condition
- Measure solenoid resistance and circuit continuity
- Inspect connector for corrosion
- Command/test actuator operation
RELATED PARTS
- Camshaft adjuster solenoid (oil control valve)
- Engine wiring harness