P0340high severityPowertrain
Camshaft Position Sensor A Circuit Bank 1
on 2023 BMW i7 M70 Dual Motor AWD · AWD
What this code means
Malfunction in the camshaft position (CMP) sensor circuit for Bank 1.
Symptoms
- Check Engine Light
- Hard starting
- Rough running
- Stalling
- Misfire
Common causes
- Faulty CMP sensor
- Wiring damage
- Distributor issue (if equipped)
- Timing chain/belt issue
Diagnostic steps
- Test CMP sensor resistance
- Check wiring
- Scope CMP signal
- Check timing belt/chain
Repair notes
Replace CMP sensor. Check timing components.
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