What does code P02AC mean?

Q: What does code P02AC mean?

Cylinder 5 - Injector Restricted. P02AC indicates that the engine control module has detected a restricted fuel injector on cylinder 5, meaning the injector is not delivering the expected amount of fuel for the commanded pulse width. The computer typically identifies this by monitoring fuel trim corrections, crankshaft speed fluctuations, or injector current feedback and comparing cylinder 5 against the other cylinders.

DTC codes / P02xx · Fuel and air metering (injector circuits) / P02AC

P02ACCylinder 5 - Injector Restricted

P02AC indicates that the engine control module has detected a restricted fuel injector on cylinder 5, meaning the injector is not delivering the expected amount of fuel for the commanded pulse width. The computer typically identifies this by monitoring fuel trim corrections, crankshaft speed fluctuations, or injector current feedback and comparing cylinder 5 against the other cylinders.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

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