DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P25D7
P25D7 indicates that the powertrain control module (PCM) has detected an abnormal signal on the fuel level sensor C circuit, which is typically the third sensor in a multi-tank or dual-sender system. The PCM monitors the voltage or resistance from this sensor and sets the code when the reading falls outside the expected range for the current fuel volume.
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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