What does code P0278 mean?

Q: What does code P0278 mean?

Cylinder 6 Contribution/Balance. P0278 is a generic powertrain code indicating that the engine control module (ECM) has detected a problem with cylinder 6's contribution to engine power, meaning that cylinder is not producing its fair share of torque compared to the others. The ECM typically monitors crankshaft speed fluctuations and compares each cylinder's power stroke to identify a weak or misfiring cylinder.

DTC codes / P02xx · Fuel and air metering (injector circuits) / P0278

P0278Cylinder 6 Contribution/Balance

P0278 is a generic powertrain code indicating that the engine control module (ECM) has detected a problem with cylinder 6's contribution to engine power, meaning that cylinder is not producing its fair share of torque compared to the others. The ECM typically monitors crankshaft speed fluctuations and compares each cylinder's power stroke to identify a weak or misfiring cylinder.

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.