Powertrain
Definition only
Lights the check engine lamp
P2661: B Rocker Arm Actuator System Performance/Stuck Off Bank 2
Standardized SAE J2012 code · P26xx — Computer and output circuits
What does P2661 mean?
The rocker arm actuator B on bank 2 is commanded to engage but does not switch.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Low oil pressure cannot move the actuator
- Medium Mechanical lock pin stuck in unactivated position
- 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 P2661 on the same make and model first.
P2661 in the community
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