P0191 Diagnostic Trouble Code Discussion for May 2022
Fuel Rail Pressure Sensor Performance
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| Help Request | Posted | |
| 2011 GMC Sierra 3500 HD SLE 6.6L MIL Lamp on VIN: 1GD523CL2B P0191: Fuel Pressure Regulator control High short to ground1. We are having problems with code P0191. Have followed SI from GM guidelines, looked for chaffed wires, rubbed through wires, fretting on connections, corrosion on connections, cleaned engine/frame grounds. Ran wiggle tests, load tested wiring with headlamp... |
May 03, 2022 | |
| 2011 GMC Sierra 3500 HD SLE 6.6L MIL Lamp on VIN: 1GD523CL2B P0191: Fuel Pressure Regulator control High short to ground1. We are having problems with code P0191. Have followed SI from GM guidelines, looked for chaffed wires, rubbed through wires, fretting on connections, corrosion on connections, cleaned engine/frame grounds. Ran wiggle tests, load tested wiring with headlamp... |
May 05, 2022 |
