What does code P02B2 mean?

Q: What does code P02B2 mean?

Cylinder 7 - Fuel Trim at Max Limit. P02B2 means the engine control module has detected that the fuel trim correction for cylinder 7 has reached its maximum allowed limit, indicating the engine computer can no longer compensate for an excessively lean or rich condition on that specific cylinder. The module monitors crankshaft speed fluctuations and oxygen sensor feedback to isolate the imbalance to cylinder 7, and it sets this code when the long-term fuel trim adjustment for that cylinder stays pegged at the limit for a calibrated period.

DTC codes / P02xx · Fuel and air metering (injector circuits) / P02B2

P02B2Cylinder 7 - Fuel Trim at Max Limit

P02B2 means the engine control module has detected that the fuel trim correction for cylinder 7 has reached its maximum allowed limit, indicating the engine computer can no longer compensate for an excessively lean or rich condition on that specific cylinder. The module monitors crankshaft speed fluctuations and oxygen sensor feedback to isolate the imbalance to cylinder 7, and it sets this code when the long-term fuel trim adjustment for that cylinder stays pegged at the limit for a calibrated period.

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.