Category: Cadillac

P0691 Cadillac 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…

P0692 Cadillac Fan 1 Control Circuit High Possible causes – Open or short cooling fan 1 relay circuit– Failed Cooling Fan Control Module Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Radiator fan inoperative– Possible engine overheating Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT ,…

P0693 Cadillac Cooling Fan 2 Relay Control Circuit Low Possible causes – Open or short cooling fan 2 relay circuit– Faulty low speed radiator fan relay– Faulty Front Control Module (FCM) Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Radiator fan inoperative– Possible engine overheating P0693 Cadillac Description The Front Control Module…

P0690 Cadillac Electronic Control Module Power Relay Sense 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) Cadillac Vehicle:Cadillac…

P0686 Cadillac 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 Cadillac Description…

P0687 Cadillac 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 Cadillac Description…

P0688 Cadillac 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…

P0689 Cadillac 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) Cadillac Vehicle:Cadillac…

P0682 Cadillac 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 Cadillac 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…

P0684 Cadillac 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 Cadillac 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 –…

P0681 Cadillac 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…