DTC P0629 Cadillac
Fuel Pump Control Circuit High Input
Fuel Pump Control Circuit High Input
Description
Engine started, engine speed over 40 rpm, system voltage from 8-18v, and the PCM detected an unexpected high voltage on the Fuel Pump control circuit for 1 second. The ECM provides system voltage to the coil side of the fuel pump relay. When the ignition
Cause and Solution
Fuel pump relay connector is damaged or open
Fuel pump relay control circuit is open or shorted to power (B+)
Fuel pump relay is damaged or it has failed
Video Guide
Diagnostic Info
- DTC Code: P0629
- Brand: Cadillac