Camshaft Position Sensor A Circuit Low (Bank 2)
What does P0347 mean?
The P0347 code means the vehicle's onboard diagnostic system has detected: Camshaft Position Sensor A Circuit Low (Bank 2). This is a critical severity code.
Common Symptoms
- Engine cranks with extended start time
- Engine stalls or runs rough
- Check Engine Light illuminated
- Misfires on bank 2 cylinders
- Reduced power from bank 2
Probable Causes (Ranked by Likelihood)
- Short to ground in bank 2 CMP sensor wiring Very High
- Faulty camshaft position sensor on bank 2 High
- Corroded or oil-contaminated sensor connector High
- Damaged wiring near valve cover or timing cover Moderate
- PCM input circuit fault Low
Step-by-Step Diagnostic Procedure
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Check bank 2 CMP sensor signal voltage -- consistently low readings confirm a circuit fault
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Test for shorts to ground in the signal wire with sensor disconnected
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Inspect the connector for oil contamination from valve cover gasket leaks
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Check the 5V reference voltage at the sensor connector
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Replace the sensor if output tests low after wiring checks pass
Frequently Asked Questions
Can I drive with code P0347?
You can drive short distances. The engine may run on bank 1 CMP data with bank 2 defaulting to batch-fire injection, causing rough running on bank 2 cylinders.
Can a valve cover gasket leak affect the bank 2 CMP sensor?
Yes. Oil from a leaking valve cover gasket can travel along the wiring and into the CMP sensor connector, shorting the signal to ground.
Is the bank 2 CMP sensor the same part as bank 1?
In many cases, yes. The same sensor part number may be used on both banks. However, always verify with your vehicle's parts catalog as some engines use different sensors per bank.