P0526 GMC Cooling Fan Speed Sensor Circuit

Possible causes – Cooling fan harness and connector– Faulty cooling fan When is the obd code mean? The P0526 code is detected when the PCM has detected a loss of cooling fan speed signal and the condition is present for at least 11 seconds. Symptoms – Engine Light ON (or Service Engine Soon Warning Light)–…

P1518 GMC Throttle Actuator Control Module Performance

Possible causes – Dead or weak battery – Poor circuit connection – Check Throttle Actuator Control (TAC) module connector for water – Faulty Throttle Actuator Control (TAC) module When is the obd code mean? The Engine Control Module (ECM) has detected a loss of data or invalid data from the Throttle Actuator Control (TAC) Symptoms…

P0513 GMC Incorrect Immobilizer Key

Possible causes – Deterrent key not programmed to vheicle– Faulty Deterrent key– Fualty ignition switch– Poor electrical connection for Deterrent circuit components Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– No or hard engine start situation P0513 GMC OBD Code Description The Engine Control Module (ECM), the Powertrain Interface Module (PIM), and…

P0633 GMC Immobilizer Key Not Programmed

Possible causes – Deterrent key not programmed to vheicle– Faulty Deterrent key– Fualty ignition switch– Poor electrical connection for Deterrent circuit components Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– No or hard engine start situation P0633 GMC OBD Code Description The Engine Control Module (ECM), the Powertrain Interface Module (PIM), and…

P1629 GMC Theft Deterrent Start Enable Signal Not Received

Possible causes – Deterrent key not programmed to vheicle– Faulty Deterrent key– Fualty ignition switch– Poor electrical connection for Deterrent circuit components Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– No or hard engine start situation P1629 GMC OBD Code Description The Engine Control Module (ECM), the Powertrain Interface Module (PIM), and…

P1632 GMC Theft Deterrent Start Disable Signal Received

Possible causes – Deterrent key not programmed to vheicle– Faulty Deterrent key– Fualty ignition switch– Poor electrical connection for Deterrent circuit components Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– No or hard engine start situation P1632 GMC OBD Code Description The Engine Control Module (ECM), the Powertrain Interface Module (PIM), and…

P1635 GMC 5 Volt Reference Circuit

Possible causes – A/C Pressure sensor harness is open or shorted– MAP sensor harness is open or shorted– EGR valve harness is open or shorted When is the obd code mean? The P1635 code is set when the reference voltage from the sensor is our of range. Symptoms – Engine Light ON (or Service Engine…

P0532 GMC A/C Refrigerant Pressure Sensor Circuit Low Input

Possible causes – A/C system low or over charge with refrigerant– Faulty A/C refrigerant pressure sensor– Cooling fans in-operative– A/C refrigerant pressure sensor circuit open or shorted– A/C refrigerant pressure sensor circuit poor electrical connection When is the obd code mean? The P0532 code is detected when the signal circuit is too low. Symptoms –…

P0533 GMC A/C Refrigerant Pressure Sensor Circuit High Input

Possible causes – A/C system low or over charge with refrigerant– Faulty A/C refrigerant pressure sensor– Cooling fans in-operative– A/C refrigerant pressure sensor circuit open or shorted– A/C refrigerant pressure sensor circuit poor electrical connection When is the obd code mean? The P0533 code is detected when the signal circuit is too high. Symptoms –…