A Rocker Arm Actuator System Performance/Stuck Off Bank 2
The rocker arm actuator A on bank 2 is commanded to engage but does not switch. Engine stays in the wrong lift mode under load on this bank.
Affected components
- Rocker arm actuator a b2
- Oil control valve
- Oil supply
Common causes
- High likelihood: Low oil pressure cannot move the actuator
- Medium likelihood: Mechanical lock pin stuck in unactivated position
- Low likelihood: Carbon or debris buildup preventing free movement
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.