What does code P22EF mean?

Q: What does code P22EF mean?

Cylinder 6 Alternative Fuel Injector Control Circuit High. P22EF indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the alternative fuel injector serving cylinder 6. The PCM commands the injector to open by pulling the control wire to ground, and it monitors the circuit for expected voltage changes; a high-voltage reading means the circuit is not being pulled low as commanded, so the injector is not firing. This code applies to vehicles equipped with a separate alternative fuel system, such as compressed natural gas (CNG) or liquefied petroleum gas (LPG), and it refers specifically to the alternative fuel injector rather than the gasoline injector.

DTC codes / P22xx · Fuel and air metering (injector circuits) / P22EF

P22EFCylinder 6 Alternative Fuel Injector Control Circuit High

P22EF indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the alternative fuel injector serving cylinder 6. The PCM commands the injector to open by pulling the control wire to ground, and it monitors the circuit for expected voltage changes; a high-voltage reading means the circuit is not being pulled low as commanded, so the injector is not firing. This code applies to vehicles equipped with a separate alternative fuel system, such as compressed natural gas (CNG) or liquefied petroleum gas (LPG), and it refers specifically to the alternative fuel injector rather than the gasoline injector.

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.