What does code P02A6 mean?

Q: What does code P02A6 mean?

Cylinder 4 - Fuel Trim at Max Limit. P02A6 means the engine computer has detected that cylinder 4's fuel trim has reached its maximum correction limit, indicating the engine is running excessively lean on that cylinder and the computer can no longer add fuel to compensate. The powertrain control module sets this code when the long-term fuel trim for cylinder 4 stays at or near its richest command for a calibrated time, often because of a vacuum leak, weak fuel delivery, or a faulty injector.

DTC codes / P02xx · Fuel and air metering (injector circuits) / P02A6

P02A6Cylinder 4 - Fuel Trim at Max Limit

P02A6 means the engine computer has detected that cylinder 4's fuel trim has reached its maximum correction limit, indicating the engine is running excessively lean on that cylinder and the computer can no longer add fuel to compensate. The powertrain control module sets this code when the long-term fuel trim for cylinder 4 stays at or near its richest command for a calibrated time, often because of a vacuum leak, weak fuel delivery, or a faulty 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.