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DTC codes / P22xx · Fuel and air metering (injector circuits) / P228F

P228FFuel Pressure Regulator A Exceeded Learning Limits - Too High

P228F indicates that the powertrain control module has detected the fuel pressure regulator 'A' control system has exceeded its adaptive learning limits in the positive direction, meaning the regulator is commanding more fuel pressure than the system can physically achieve or the feedback signal indicates pressure is higher than expected. The computer stores this code when the learned correction value for the fuel pressure regulator has reached its maximum allowable threshold, typically after repeated driving cycles.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyProfessional
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.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage