Possible causes – Fualty ECM– Wrong ECM for vehicle– Service program error When is the obd code mean? Engine Control Module (ECM) program does not recognize the vehicles id, or the id is missing in the ECM. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1681 GMC OBD Code Description This diagnostic…
Tag: GMC
P0052 GMC HO2S Heater Control Circuit High Bank 2 Sensor 1
Possible causes – Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted to ground– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit poor electrical connection– Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit fuse– Faulty Engine Control Module (ECM) When is…
P2178 GMC Fuel Trim System Rich at Cruise or Accel
Possible causes – High fuel pressure– Leaking fuel injector or pressure regulator– Failed Mass Air Flow (MAF) sensor When is the obd code mean? The Engine Control Module (ECM) has detected a rich air/fuel ratio Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P2178 GMC OBD Code Description The Engine Control Module…
P1508 GMC Idle Speed Low Idle Air Control System Not Responding
Possible causes – Idle Air Control Valve harness is open or shorted– Idle Air Control Valve circuit poor electrical connection– Faulty Idle Air Control Valve Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Engine rough idle
P0713 GMC Transmission Fluid Temperature Sensor Circuit High Input
Possible causes – Faulty Transmission Fluid Temperature Sensor– Transmission Fluid Temperature Sensor harness is open or shorted– Transmission Fluid Temperature Sensor circuit poor electrical connection When is the obd code mean? Transmission Control Module (TCM) detects excessively high voltage from the fluid temperature sensor. Symptoms – Engine Light ON (or Service Engine Soon Warning Light)–…
P0711 GMC Transmission Fluid Temperature Sensor Circuit Range/Performance
Possible causes – Faulty Transmission Fluid Temperature Sensor– Transmission Fluid Temperature Sensor harness is open or shorted– Transmission Fluid Temperature Sensor circuit poor electrical connection When is the obd code mean? Transmission Control Module (TCM) detects excessively low or high voltage from the fluid temperature sensor. Symptoms – Engine Light ON (or Service Engine Soon…
P0712 GMC Transmission Fluid Temperature Sensor Circuit Low Input
Possible causes – Faulty Transmission Fluid Temperature Sensor– Transmission Fluid Temperature Sensor harness is open or shorted– Transmission Fluid Temperature Sensor circuit poor electrical connection When is the obd code mean? Transmission Control Module (TCM) detects excessively low voltage from the fluid temperature sensor. Symptoms – Engine Light ON (or Service Engine Soon Warning Light)–…
P0123 GMC Throttle Position Sensor Circuit High Voltage
Possible causes – Faulty throttle position sensor– Throttle position sensor harness is open or shorted– Throttle position sensor circuit poor electrical connection When is the obd code mean? An excessively high voltage from the Throttle Position (TP) Sensor is sent to Engine Control Module (ECM). Symptoms – Engine Light ON (or Service Engine Soon Warning…
P0122 GMC Throttle Position Sensor 1 Circuit Low Voltage
Possible causes – Faulty throttle position sensor– Throttle position sensor harness is open or shorted– Throttle position sensor circuit poor electrical connection When is the obd code mean? An excessively low voltage from the Throttle Position (TP) Sensor is sent to Engine Control Module (ECM). Symptoms – Engine Light ON (or Service Engine Soon Warning…
P1120 GMC Throttle Position Sensor 1 Circuit
Possible causes – Faulty Throttle Position Sensor– Throttle Position Sensor harness is open or shorted– Throttle Position Sensor circuit poor electrical connection– Throttle Position Sensor not properly adjusted When is the obd code mean? When the Powertrain Control Module (PCM) senses a signal voltage higher than the normal operating range of the sensor, the P1120…