P0687 ISUZU Engine Control Ignition Relay Control Circuit High Voltage

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 ISUZU OBD Code Description The Engine Control Module (ECM) has detected a…

P0219 ISUZU Engine Overspeed Condition

Possible causes – Wheel slippage (water, ice, mud, and snow)– Excessive engine RPM in NEUTRAL or operated in the wrong transmission gear Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0219 ISUZU OBD Code Description Indicates the vehicle has been operated in a manner which caused the engine speed to exceed a…

P0690 ISUZU Engine Controls Ignition Relay Feedback Circuit High Voltage

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 the ECM relay. Symptoms – Engine Light ON (or…

P0686 ISUZU Engine Control Ignition Relay Control Circuit Low Voltage

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 ISUZU OBD Code Description The Engine Control Module (ECM) has detected a…

P0449 ISUZU Evaporative Emissions Vent Solenoid Control Circuit

Possible causes – Purge Control Valve harness is open or shorted– Purge Control Valve electrical circuit poor connection– Faulty canister vent control valve When is the obd code mean? The Engine Control Module (ECM) has determined that a malfunction exists in the electrical circuit for the vent valve/solenoid in the evaporative emission control system. Symptoms…

P2444 ISUZU Secondary Air Injection System Pump Stuck ON

Possible causes – Short in Air Pump circuit– Air pump assembly– Faulty Pressure Sensor– Pressure Sensor harness is open or shorted– Pressure Sensor circuit poor electrical connection When is the obd code mean? If the pressure level from the sensor has not reached a certain level despite the ECM turning on the air pump,or if…

P0700 ISUZU CAN-BUS no communication with TCM

Possible causes – Shorted or open circuit within Transmission Control Module (TCM)– Faulty Transmission Control Module (TCM) Tech description Since the P0700 is just and informative code, check the TCM for more codes to resolve the problem. Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Driveability problems– Transmission shifting problems P0700 ISUZU…

P0088 ISUZU Fuel Rail Pressure Too High

Possible causes – Sticking fuel rail pressure regulator– Faulty fuel rail pressure sensor When is the obd code mean? Engine Control Module (ECM) detects fuel rail pressure too high Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0088 ISUZU OBD Code Description

P0087 ISUZU Fuel Rail Pressure Too Low

Possible causes – Sticking fuel rail pressure regulator– Faulty fuel rail pressure sensor– Blocked fuel line pickup When is the obd code mean? Engine Control Module (ECM) detects fuel rail pressure went high then decreased sharply Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0087 ISUZU OBD Code Description