What does code P230C mean?

DTC codes / P23xx · Ignition system and misfire / P230C

P230CCylinder 3 Air-Fuel Ratio Imbalance Adjustment At Limit During Balance

P230C indicates that the powertrain control module (PCM) has detected an air-fuel ratio imbalance on cylinder 3 that is severe enough to reach the adjustment limit during a balance test. The PCM monitors crankshaft speed variations to identify a weak or rich cylinder, and when the fuel trim correction for cylinder 3 can no longer compensate, it sets this code.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaIgnition system and misfire

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