Camshaft Position Sensor A Circuit Malfunction (Bank 2)
What does P0345 mean?
The P0345 code means the vehicle's onboard diagnostic system has detected: Camshaft Position Sensor A Circuit Malfunction (Bank 2). This is a critical severity code.
Common Symptoms
- Engine runs rough or misfires on bank 2
- Extended cranking on startup
- Check Engine Light illuminated
- Reduced engine power
- Engine may stall
Probable Causes (Ranked by Likelihood)
- Faulty camshaft position sensor on bank 2 Very High
- Damaged or corroded CMP sensor wiring or connector High
- Timing chain stretch or jump on bank 2 Moderate
- Oil contamination on sensor Moderate
- PCM CMP input circuit failure Low
Step-by-Step Diagnostic Procedure
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Verify CMP sensor bank 2 signal with a scan tool during cranking -- compare to bank 1
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Test CMP sensor resistance and compare to manufacturer specification
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Inspect the sensor connector for corrosion, oil contamination, or damage
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Check the bank 2 timing chain for proper tension and alignment
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Replace the CMP sensor if it fails electrical tests after wiring is verified good
Frequently Asked Questions
Can I drive with code P0345?
You can drive short distances if the engine runs. Bank 2 fuel injection may default to batch-fire mode, causing rough running and poor performance.
What is the difference between P0340 and P0345?
P0340 refers to the CMP sensor on bank 1 (the side with cylinder 1). P0345 refers to the CMP sensor on bank 2 (the opposite side). V-engines have one CMP sensor per bank.
Can I replace the bank 2 CMP sensor without removing the intake manifold?
On many V-engines, the bank 2 CMP sensor is accessible from the top or rear of the engine without removing the intake. However, access varies significantly by vehicle.