Powertrain
Definition only
Lights the check engine lamp
P2652: B Rocker Arm Actuator System Stuck On Bank 1
Standardized SAE J2012 code · P26xx — Computer and output circuits
What does P2652 mean?
The rocker arm actuator B on bank 1 stays in the activated state when commanded off. Engine cannot return to the alternate lift or cylinder mode.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Mechanical lock pin stuck in activated position
- Medium Oil control valve spool stuck open
- Low Carbon or debris buildup preventing free movement
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2652 on the same make and model first.
P2652 in the community
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