Fuel Pump Driver Control Module System Voltage High Voltage
Table of contents
P129C GMC Possible Causes
- Faulty Fuel Pump Power Control Module
- Fuel Pump Power Control Module harness is open or shorted
- Fuel Pump Power Control Module circuit poor electrical connection
How do I fix code P129C GMC?
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 P129C GMC code
The cost of diagnosing the P129C GMC 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.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P129C GMC Description
The Fuel Pump Power Control Module monitors the battery positive voltage circuit to verify the voltage is between the normal operating range. The Diagnostic Trouble Code (DTC) will set when the Fuel Pump Power Control Module detects the battery positive voltage is greater than 18 V for 1 s.