What does code P3488 mean?

Q: What does code P3488 mean?

Cylinder 11 Exhaust Valve Control Circuit High. P3488 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the electrical circuit that controls the exhaust valve for cylinder 11, which is part of a variable valve timing or cylinder deactivation system. The PCM expects the circuit to draw current and pull the voltage low when the valve is commanded, but instead it sees voltage near battery positive, indicating an open circuit, a short to power, or a failed actuator.

DTC codes / P34xx · Auxiliary emission controls / P3488

P3488Cylinder 11 Exhaust Valve Control Circuit High

P3488 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the electrical circuit that controls the exhaust valve for cylinder 11, which is part of a variable valve timing or cylinder deactivation system. The PCM expects the circuit to draw current and pull the voltage low when the valve is commanded, but instead it sees voltage near battery positive, indicating an open circuit, a short to power, or a failed actuator.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.