B Camshaft Position Timing Over-Advanced Bank 1
The P0014 code indicates that the Engine Control Module (ECM) has detected the exhaust (B) camshaft timing for Bank 1 is more advanced than the commanded position. This typically occurs when the variable valve timing (VVT) system fails to retard the camshaft timing as requested by the engine computer.
While the vehicle can usually still be driven, prolonged driving with incorrect camshaft timing can lead to poor performance, increased emissions, and potential internal engine wear. It should be diagnosed and repaired soon to restore proper engine function.
Common symptoms
- Illuminated Check Engine Light
- Rough idle or stalling
- Decreased engine power and acceleration
- Reduced fuel economy
- Hard starting condition
Likely causes
- Low engine oil level or dirty/contaminated oil
- Faulty variable valve timing (VVT) control solenoid / oil control valve
- Clogged VVT solenoid screen or oil passages
- Worn or damaged timing chain, tensioner, or guides
- Defective camshaft position sensor
- Faulty variable valve timing actuator/phaser
What to check before replacing parts
Check the engine oil level and condition.
Look for: Oil that is significantly low, excessively dirty, or sludgy, which prevents proper hydraulic operation of the VVT system.
Scan for related DTCs and monitor VVT live data.
Look for: A mismatch between the commanded and actual camshaft position on a scan tool, or concurrent oil pressure and cam sensor codes.
Inspect and test the VVT oil control valve/solenoid.
Look for: A solenoid that fails to actuate when energized with a power probe, has out-of-spec electrical resistance, or has clogged filter screens.
Test the camshaft position sensor.
Look for: An erratic, weak, or missing square wave signal on an oscilloscope, or physical damage/debris on the sensor tip.
Inspect the timing chain and VVT phaser assembly.
Look for: A stretched timing chain, broken chain guides, or a mechanically stuck VVT phaser requiring mechanical teardown to verify.
This page explains the generic P0014 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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