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DTC - Diagnostic Trouble Codes information

P0629

Powertrain Codes

P0629 - CHRYSLER - High Voltage Detected At The Fuel Lift Pump

Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

- Fuel lift pump circuit short to ground - Faulty fuel lift pump

When Detected

The commanded signal to the fuel lift pump does not match the feedback signal

Description

When the ignition switch is turned on The ECM will mobilize the fuel pump relay and run the in-tank fuel pump as soon as the ignition is switched ON. The fuel pump will function till the engine cranks or runs, and the ECM continues to obtain ignition reference pulses.