2A98moderate severityPowertrain
Camshaft Position Sensor, Intake, Correlation/Adjustment
on 2021 BMW 740i 3.0L I6 Turbo B58 · RWD
What this code means
The intake camshaft position doesn't match the crankshaft position within the VANOS adjustment range, similar to OBD code P0011. Usually caused by a stuck or worn VANOS unit or oil control valve rather than the sensor itself.
Symptoms
- Rough idle or stalling
- Reduced power and poor acceleration
- Check engine light on
Common causes
- Faulty intake VANOS solenoid/oil control valve
- Low or dirty engine oil
- Stretched or jumped timing chain
- Faulty intake camshaft position sensor
Diagnostic steps
- Read freeze frame and check oil level/condition
- Test intake VANOS solenoid resistance and operation
- Inspect timing chain for stretch or wear
- Verify camshaft sensor signal against crankshaft
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