DTC codes / P22xx · Fuel and air metering (injector circuits) / P228C
P228C indicates that the powertrain control module has detected the fuel pressure regulator for bank A is unable to maintain the commanded fuel pressure, with actual pressure falling below the desired value despite the regulator being commanded to its maximum control limit. The computer recognizes this as a low-pressure condition that the regulator can no longer correct, often due to a mechanical fault or a restriction in the fuel system.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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