Possible causes – Faulty Intake Air Heater– Intake Air Heater harness is open or shorted– Intake Air Heater circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0640 GMC OBD Code Description The intake air (IA) heater is located in the air inlet tube and is used to warm…
Tag: GMC
P0113 GMC Intake Air Temperature Circuit High Input
Possible causes – Faulty Intake Air Temperature (IAT) sensor– Dirty air filter– Intake Air Temperature (IAT) sensor harness is open or shorted– Intake Air Temperature (IAT) sensor circuit poor electrical connection When is the obd code mean? – An excessively high voltage from the sensor is sent to ECM. Symptoms – Engine Light ON (or…
P0357 GMC Ignition Coil 7 Control Circuit
Possible causes – Faulty Ignition Coil 7– Ignition Coil 7 harness is open or shorted– Ignition Coil 7 circuit poor electrical connection– Faulty Powertrain Control Module (PCM) When is the obd code mean? Each ignition circuit is continuously monitored by the Powertrain Control Module (PCM). The test fails when the PCM does not receive a…
P0358 GMC Ignition Coil 8 Control Circuit
Possible causes – Faulty Ignition Coil 8– Ignition Coil 8 harness is open or shorted– Ignition Coil 8 circuit poor electrical connection– Faulty Powertrain Control Module (PCM) When is the obd code mean? Each ignition circuit is continuously monitored by the Powertrain Control Module (PCM). The test fails when the PCM does not receive a…
B1380 GMC Device Ignition Accessory Circuit Open
Possible causes – Faulty Ignition Switch– Ignition Switch harness is open or shorted– Ignition Switch circuit poor electrical connection When is the obd code mean? Whne the BCM detects a short to ground in the circuit or a short to battery or an open in the circuit when the switch is in the OFF position….
P2534 GMC Ignition Switch Run/Start Position Circuit Low
Possible causes – Faulty Ignition Switch– Ignition Switch harness is open or shorted– Ignition Switch circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P1682 GMC Ignition 1 Switch Circuit 2
Possible causes – Faulty ignition switch– Ignition Switch harness is open or shorted– Ignition Switch circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the obd code mean? The ECM has detected a voltage deifference between two circuits Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Possible no crank or…
P1137 GMC HO2S Bank 1 Sensor 2 Lean System or Low Voltage
Possible causes – Faulty HO2S Bank 1 Sensor 2– HO2S Bank 1 Sensor 2 harness is open or shorted– HO2S Bank 1 Sensor 2 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P1138 GMC HO2S Bank 1 Sensor 2 Rich or High Voltage
Possible causes – Faulty HO2S Bank 1 Sensor 2– HO2S Bank 1 Sensor 2 harness is open or shorted– HO2S Bank 1 Sensor 2 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P1139 GMC HO2S Insufficient Switching Bank 1 Sensor 2
Possible causes – Faulty HO2S Bank 1 Sensor 2– HO2S Bank 1 Sensor 2 harness is open or shorted– HO2S Bank 1 Sensor 2 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)