What this code means

The intake camshaft timing for Bank 1 is more advanced than the PCM commanded. This is often caused by a stuck VVT solenoid or sludge in the oil passages.

Symptoms

• Check Engine Light
• Rough idle
• Poor fuel economy
• Engine stalling
• Rattling noise

Common causes

• Dirty engine oil/sludge
• Stuck VVT solenoid
• Camshaft phaser worn
• Oil passage blockage
• Timing chain stretched

Diagnostic steps

1. Check oil level and condition
2. Perform oil pressure test
3. Inspect VVT solenoid screen for debris
4. Monitor camshaft position with scan tool
5. Check timing chain condition

Repair notes

Perform oil change if dirty. Replace VVT solenoid. If phaser is worn, replace camshaft phaser assembly.

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