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DTC codes / P2Axx · Hybrid propulsion / P2A63
P2A63 indicates that the powertrain control module (PCM) has detected an intermittent or erratic signal from the fuel level sensor in the alternative fuel tank, designated as tank B. The PCM monitors the sensor's voltage or resistance and flags the code when the reading jumps unpredictably or drops out momentarily, rather than showing a steady level.
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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