The engine control module has detected a voltage signal below the normal operating range on the rocker arm actuator circuit for Bank 2. This typically indicates an electrical short or a component failure within the variable valve lift system.
The actuator solenoid has suffered an internal electrical short, causing the circuit voltage to drop below the expected threshold.
The wiring between the PCM and the actuator is chafed or damaged, creating a short to ground.
Moisture or debris within the electrical connector has created a poor connection or a partial short.
The internal driver circuit within the engine control module has failed, though this is rare.
No. While the PCM is listed as a potential cause, the vast majority of P2658 cases are caused by the actuator itself or wiring faults. Replacing the PCM before verifying the wiring and actuator is generally incorrect.
Yes, the vehicle will generally remain drivable, but it may enter a reduced-power mode or operate with decreased efficiency due to the loss of variable valve control.
No. P2658 is an electrical circuit low code, meaning the computer sees a voltage issue; it is not triggered by vacuum leaks or mechanical air leaks.