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DTC codes / P22xx · Fuel and air metering (injector circuits) / P229A
P229A indicates that the powertrain control module (PCM) has detected the fuel pressure regulator for circuit B is unable to maintain the commanded low fuel pressure, with actual pressure falling below the desired value. The PCM monitors the fuel pressure sensor and regulator circuit, and when the pressure remains too low despite the regulator being commanded to increase it, this code is stored.
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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