High Voltage Detected At The Fuel Lift Pump
Table of contents
P0629 DODGE Possible Causes
- Faulty Fuel Lift Pump
- Fuel Lift Pump harness is open or shorted
- Fuel Lift Pump circuit poor electrical connection
- Totally Integrated Power Module (TIPM) Not Configured Properly
- Faulty Totally Integrated Power Module (TIPM)
- Faulty Powertrain Control Module (PCM)
How do I fix code P0629 DODGE?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P0629 DODGE code
The cost of diagnosing the P0629 DODGE code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the code detected
The commanded signal to the fuel lift pump does not match the feedback signal
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0629 DODGE Description
The Fuel Lift Pump Control circuit is a low side driver inside the Powertrain Control Module (PCM). The PCM sends a ground signal to the Totally Integrated Power Module (TIPM). The TIPM then sends a 12 Volt feed to the Fuel Lift Pump. The Fuel Lift Pump grounds through a dedicated ground circuit. The MIL lamp and ETC lamp will illuminate immediately after this diagnostic runs and fails. During this time, the customer may experience engine stumble/stall or low power due to lack of fuel supply to the high pressure system. The PCM will turn off the MIL lamp once the diagnostic runs and passes in four consecutive drive cycles.