Category: Buick

P0695 Buick Fan 3 Control Circuit Low OBD Code: System: Subsystem:  P0695 Buick – (ASE)  Powertrain  Computer and Auxiliary Output Circuits Trouble Code Description: Fan 3 Control Circuit Low Location: Analysis: Possible Causes:  Fan 3  End of Range – Circuit Lower Than Expected   Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse –…

P0691 Buick Fan 1 Control Circuit Low Possible causes – Faulty Low Speed Radiator Fan Relay– Low Speed Radiator Fan Relay harness is open or shorted– Low Speed Radiator Fan Relay circuit poor electrical connection– Faulty Electric Fan– Faulty Engine Control Module (ECM) Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Radiator…

P0689 Buick Electronic Control Module Power Relay Sense Circuit Low Possible causes – Weak battery – Low voltage while cranking– Faulty Engine Control Module (ECM) relay– Blown ECM fuse– Faulty ECM– ECM harness is open or shorted– ECM circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick…

P068A Buick Engine Control Module (ECM) / Powertrain Control Module (PCM) Power Relay De – Energized Performance Too Early OBD Code: System: Subsystem:  P068A Buick – (ASE)  Powertrain  Computer and Auxiliary Output Circuits Trouble Code Description: Engine Control Module (ECM) / Powertrain Control Module (PCM) Power Relay De – Energized Performance Too Early Location: Analysis: Possible…

P0687 Buick Engine Control Module Power Relay Control Circuit High Possible causes – Weak battery- Low voltage while cranking– Faulty Engine Control Module (ECM) relay– Blown ECM fuse– Faulty ECM– ECM harness is open or shorted– ECM circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0687 Buick Description…

P0688 Buick Electronic Control Module Power Relay Control Circuit Open Possible causes – Weak battery- Low voltage while cranking– Faulty Engine Control Module (ECM) relay– Blown ECM fuse– Faulty ECM– ECM harness is open or shorted– ECM circuit poor electrical connection Tech description Check all the ECM fuses, if the fuses are OK try replacing…

P0684 Buick Glow Plug Control Module- Implausible Signal Possible causes – Faulty Glow Plug Control Module (GPCM)– GPCM harness is open or shorted– GPCM circuit poor electrical connection– Faulty Engine Control Module (ECM) Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Lack/Loss of Power– The engine may be harder to start– Engine…

P0685 Buick Electronic Control Module Power Control Circuit Malfunction Possible causes – Faulty Engine Control Module (ECM) power relay– ECM power relay harness is open or shorted– ECM power relay circuit poor electrical connection– Faulty (ECM) Tech description Check all the ECM fuses, if the fuses are OK try replacing the ECM relay. Symptoms –…

P0686 Buick Engine Control Module Power Relay Control Circuit Low Possible causes – Weak battery- Low voltage while cranking– Faulty Engine Control Module (ECM) relay– Blown ECM fuse– Faulty ECM– ECM harness is open or shorted– ECM circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0686 Buick Description…

P0681 Buick Cylinder 11 Glow Plug Circuit Fault Possible causes – Faulty cylinder #11 glow plug– Cylinder #11 glow plug harness is open or shroted– Cylinder #11 glow plug circuit poor electrical connection– Faulty glow plug module What about the obd code? The Engine Control Module (ECM) has detected a fault in the cylinder #11…

P0682 Buick Cylinder 12 Glow Plug Circuit Fault Possible causes – Faulty cylinder #12 glow plug– Cylinder #12 glow plug harness is open or shroted– Cylinder #12 glow plug circuit poor electrical connection– Faulty glow plug module What about the obd code? The Engine Control Module (ECM) has detected a fault in the cylinder #12…

P0683 Buick Glow Plug Module Control To ECM Communication Circuit Fault Possible causes – Faulty Glow Plug Control Module (GPCM)– GPCM harness is open or shorted– GPCM circuit poor electrical connection– Faulty Engine Control Module (ECM) What about the obd code? The Engine Control Module (ECM) has detected a communication fault with the Glow Plug…