P0397
PowertrainCrankshaft Camshaft Positionmoderate severityCamshaft Position Sensor B Circuit (Bank 2 or Single Sensor)
What P0397 Means
The PCM detects a general circuit fault in the camshaft position sensor B for Bank 2. This affects valve timing feedback and engine synchronization.
Symptoms
- Hard starting
- Rough running
- Check engine light on
Common Causes
- Faulty camshaft position sensor
- Wiring or connector damage
- Damaged reluctor wheel
- PCM circuit fault
Diagnostic Steps
- Scan for cam sensor codes
- Inspect sensor wiring and connector
- Verify sensor air gap and tone ring
- Replace sensor if signal is faulty
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ANCEL AD410 →
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Serious DIY~$100
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Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
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✓ Autel official store
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