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DTC codes / P2Axx · Hybrid propulsion / P2A1B
P2A1B indicates that the engine control module (ECM) has detected an out-of-range or performance fault in the fuel metering control circuit for the injection pump, specifically affecting the cam, rotor, or injector signal path. The ECM monitors the expected fuel delivery command versus the actual response and sets this code when the feedback signal does not match the commanded value within a calibrated time or range.
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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