P1678 CADILLAC Immobilizer Powertrain Identification Failed

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 P1678 CADILLAC OBD Code Description The Engine Control Module (ECM), the Powertrain Interface Module (PIM), and…

P1679 CADILLAC Immobilizer Environment Identification Failed

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 P1679 CADILLAC OBD Code Description The Engine Control Module (ECM), the Powertrain Interface Module (PIM), and…

P0563 CADILLAC System Voltage High

Possible causes – Battery defective– Loose or missing alternator drive belt– Faulty alternator– Open or short system voltage circuit Tech description Higher than expected voltage problems are most likely caused by bad voltage regulator. The voltage regulator is part of the alternator. When is the obd code mean? The Powertrain Control Module (PCM) has detected…

P0526 CADILLAC 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)–…

P1635 CADILLAC 5 Volt Reference 1 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 CADILLAC 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 CADILLAC 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 –…

P0530 CADILLAC Air Conditioning Refrigerant Pressure Sensor Circuit

Possible causes – A/C system low or over charged with refrigerant– Faulty A/C Refrigerant Pressure Sensor– Cooling fans in-operative– A/C Refrigerant Pressure Sensor harness is open or shorted– A/C Refrigerant Pressure Sensor circuit poor electrical connection When is the obd code mean? The P0530 code is detected when the signal circuit is less than 5…

P1271 CADILLAC Accelerator Pedal Position Sensor 1-2 Correlation

Possible causes – Accelerator Pedal Position Sensor 1-2 harness is open or shorted – Accelerator Pedal Position Sensor 1-2)circuit poor electrcila connection – Faulty Accelerator Pedal Position Sensor 1-2 Symptoms – Engine Light ON (or Service Engine Soon Warning Light) – Possible poor acceleration P1271 CADILLAC OBD Code Description The Engine Control Module (ECM) compared…