Error code
OBD2 P2657
OBD2P2657
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
'A' Rocker Arm Actuator System Stuck On.
Severity
highDriving with this issue is not recommended as it can cause engine performance problems and potential mechanical failure.
Summary
P2657 indicates that the rocker arm actuator A on bank 2 of the engine is stuck in the 'on' position, which can affect valve operation.
Common Causes
- Wear or damage to the rocker arm actuator
- Electrical issues causing the actuator to malfunction
Fixes
- Replace the faulty rocker arm actuator A on bank 2.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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