Fault in the camshaft position sensor signal — affects sync, starting, and VarioCam control.
SYMPTOMS
- Check-engine light
- Hard start or no-start
- Stalling
- Rough running
- Reduced power
LIKELY CAUSES
- Failed cam sensor
- Wiring/connector fault
- Reluctor ring damage
- Cam timing fault
DIAGNOSIS STEPS
- Scope cam vs crank signal correlation
- Check wiring
- Inspect the sensor and reluctor
RELATED PARTS
- Camshaft position sensor