![]() This specifically means there’s a high voltage situation problem detected by the PCM (powertrain control module, also known as ECM or engine control module in other vehicle makes). When Error Code P0629 appears, that means there’s a problem detected in the fuel pump “A” control circuit. Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model to another. It’s more common among Chevrolet, Chrysler, Dodge, Ford, Mitsubishi, Nissan, Jeep, Toyota, etc. ![]() This code is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II system, particularly those made since 1996 up to present. This means there’s a problem with the “A” control circuit in the fuel pump, which is caused by bad connectors/wires or defective CAN bus. Error Code P0629 is defined as Fuel Pump A Control Circuit High.
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