A Camshaft Position Slow Response Bank 1
The intake camshaft phaser on bank 1 responds too slowly to commanded position changes. Often caused by VVT solenoid sticking, oil aging, or low oil pressure.
Affected components
- Vvt solenoid intake bank1
- Cam phaser intake
- Engine oil
Common causes
- High likelihood: VVT solenoid clogged with sludge
- Medium likelihood: Low oil pressure or wrong oil viscosity
- Medium likelihood: Cam phaser worn internally
Possible symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.