B Camshaft Position - Stuck In Locked Position Bank 1
Camshaft phaser B on bank 1 will not unlock from its base position. The phaser stays at the park-lock angle and cannot be advanced or retarded as commanded.
Affected components
- Cam phaser b b1
- Park lock pin
- Oil control valve
Common causes
- High likelihood: Park-lock pin stuck in the locked groove
- Medium likelihood: Low oil pressure cannot push the lock pin out
- Medium likelihood: Oil control valve blocked by debris
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
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.