P0011: A Camshaft Position — Timing Over-Advanced or System Performance (Bank 1)
Variable Valve Timing (VVT) phaser did not return to target angle or remained over-advanced.
| Trouble Code (DTC) | P0011 |
|---|---|
| Official SAE Definition | A Camshaft Position — Timing Over-Advanced or System Performance (Bank 1) |
| Vehicle Subsystem | powertrain |
| Driving Severity | MEDIUM |
Observable Symptoms
- Rough idle or rattling on startup
- Reduced power and poor fuel economy
- MIL illuminated
Most Probable Root Causes
- Low engine oil level or sludged oil blocking VVT oil control valve screen
- Sticking VVT solenoid (OCV)
- Worn camshaft phaser actuator
Step-by-Step Diagnostic Procedure
- Check engine oil level and viscosity immediately
- Remove and inspect VVT solenoid mesh filter screen for debris