Powertrain
Definition only
Lights the check engine lamp
P2656: A Rocker Arm Actuator System Performance/Stuck Off Bank 2
Standardized SAE J2012 code · P26xx — Computer and output circuits
What does P2656 mean?
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.
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 P2656 on the same make and model first.
P2656 in the community
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