Fault Code P0391
Code meaning, symptoms, possible causes, part number, and estimated cost.
P0391
Camshaft Position Sensor 'B' Circuit Range/Performance (Bank 2)
This code indicates that the signal from Camshaft Position Sensor 'B' in Bank 2 is out of the expected range or its performance is not normal. This can affect engine timing and starting, similar to P0366 but for the second bank.
Part Details
Part Name
Camshaft Position Sensor 'B'
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪300 - ₪900
Engine Location
Cylinder Head (Bank 2)
Symptoms
- Hard starting or no start condition
- Sudden engine stall
- Engine misfires or hesitation
- Check Engine Light on
Possible Causes
- 1Faulty Camshaft Position Sensor 'B' (Bank 2)
- 2Loose or damaged wiring in the sensor circuit
- 3Engine timing issues (e.g., timing chain)
- 4Debris or contamination on the sensor
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