Tag: GMC

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…

P0654 GMC Engine Speed Output Circuit

Possible causes – Faulty Instrument Cluster– Instrument Cluster harness is open or shorted– Instrument Cluster circuit poor electrical connection– Faulty PCM When is the obd code mean? If the fault detection circuit senses a voltage other than what is expected, the fault line status changes causing the P0654 code will set. Symptoms – Engine Light…

U0141 GMC Lost Communication With Instrument Panel Module

Possible causes – Faulty Instrument Panel Module (IPM)– IPM harness is open or shorted– IPM circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) U0141 GMC OBD Code Description Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications…

P0543 GMC Intake Air Heater Element Open

Possible causes – Faulty Intake Air Heater relay– Faulty Intake Air Heater– Intake Air Heater harness is open or shorted– Intake Air Heater circuit poor electrical connection When is the obd code mean? The Engine Control Module (ECM) sends a bias voltage on diagnostic circuits one and two. If this voltage is not pulled low…

P0640 GMC Manifold Intake Air Heater

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…

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…

P0353 GMC Ignition Coil 3 Control Circuit

Possible causes – Faulty Ignition Coil 3– Ignition Coil 3 harness is open or shorted– Ignition Coil 3 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…

P0354 GMC Ignition Coil 4 Control Circuit

Possible causes – Faulty Ignition Coil 4– Ignition Coil 4 harness is open or shorted– Ignition Coil 4 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…

P0355 GMC Ignition Coil 5 Control Circuit

Possible causes – Faulty Ignition Coil 5– Ignition Coil 5 harness is open or shorted– Ignition Coil 5 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…