Engine Performance - 6.0L Bi-Fuel & CNG DTCS
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
ENGINE PERFORMANCE - 6.0L BI-FUEL & CNG DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC P0005 | FUEL SHUTOFF VALVE "A" CONTROL CIRCUIT/OPEN |
| DTC P0148 | FUEL DELIVERY ERROR |
| DTC P0171, P0174 | P0171: FUEL TRIM SYSTEM LEAN - BANK 1 & P0174: FUEL TRIM SYSTEM LEAN - BANK 2 |
| DTC P0172, P0175 | P0172: FUEL TRIM SYSTEM RICH - BANK 1 & P0175: FUEL TRIM SYSTEM RICH - BANK 2 |
| DTC P0182 | FUEL TANK TEMPERATURE SENSOR CIRCUIT - LOW VOLTAGE |
| DTC P0183 | FUEL TANK TEMPERATURE SENSOR CIRCUIT - HIGH VOLTAGE |
| DTC P0187 | FUEL RAIL TEMPERATURE SENSOR CIRCUIT - LOW VOLTAGE |
| DTC P0188 | FUEL RAIL TEMPERATURE SENSOR CIRCUIT - HIGH VOLTAGE |
| DTC P0191 | FUEL RAIL PRESSURE SENSOR CIRCUIT PERFORMANCE |
| DTC P0192 | FUEL RAIL PRESSURE SENSOR CIRCUIT - LOW VOLTAGE |
| DTC P0193 | FUEL RAIL PRESSURE SENSOR CIRCUIT - HIGH VOLTAGE |
| DTC P0200 | INJECTOR CONTROL CIRCUIT VOLTAGE |
| DTC P0300 | RANDOM/MULTIPLE CYLINDER MISFIRE DETECTED |
| DTC P0611 | FUEL INJECTOR CONTROL MODULE PERFORMANCE |
| DTC P1020 | INCORRECT VOLTAGE ON A CNG FUEL INJECTOR CONTROL CIRCUIT |
| DTC P1021, P1021, P1021, P1021, P1021, P1021, P1021, P1028 | INCORRECT VOLTAGE ON A CNG FUEL INJECTOR CONTROL CIRCUIT |
| DTC P1204 | VEHICLE DOES NOT START ON CNG |
| DTC P1207 | FUEL RAIL PRESSURE OUTPUT PWM SIGNAL NOT RECEIVED BY PCM |
| DTC P1209 | FICM DIAGNOSTIC OUTPUT PWM SIGNAL NOT RECEIVED BY PCM |
| DTC P1432 | FUEL TANK PRESSURE SENSOR SIGNAL LOW |
| DTC P1433 | FUEL PRESSURE SENSOR SIGNAL HIGH |
| DTC P2146 | INCORRECT VOLTAGE DETECTED - COMMAND STATE OF AFO ENABLE CIRCUIT |
| DTC P2665 | INCORRECT VOLTAGE DETECTED - LOW PRESSURE LOCK-OFF SOLENOID |