Fuel Pressure Relief Control Circuit Low
Table of contents
P009C GMC Possible Causes
- Faulty Fuel Pressure Relief Valve
- Fuel Pressure Relief Valve harness is open or shorted
- Fuel Pressure Relief Valve circuit poor electrical connection
How do I fix code P009C 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 P009C GMC code
The cost of diagnosing the P009C 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)
P009C GMC Description
The Engine Control Module (ECM) uses the Fuel Rail Pressure (FRP) sensor to monitor the high side fuel pressure and the fuel rail pressure relief valve performance. The fuel rail pressure relief valve is designed to release fuel pressure in the event of an overpressure condition. This diagnostic looks for excessive fuel rail pressure decay to detect an open fuel rail pressure relief valve.