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…

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

P0420 ISUZU Catalyst System Low Efficiency Bank 1

Possible causes – Three way catalyst converter Bank 1– Exhaust tube– Intake air leaks– Fuel injectors may be faulty– Fuel injector leaks– Spark plugs may be faulty– Improper ignition timing– Engine Control Module (ECM) Tech description As the code description implies the P0420 code means that the vehicle’s control module has detected that the three-way…

P0220 ISUZU Throttle Position Sensor 2 Circuit

Possible causes – Throttle Position Sensor (TPS) harness is open or shorted– Throttle Position Sensor (TPS) circuit poor electrical connection– Faulty Throttle Position Sensor (TPS)– Fault Electric Throttle Control Actuator (or Throttle Body Motor)– Accelerator Pedal Position Sensor (APP) When is the obd code mean? An unexpected voltage from the Throttle Position Sensor (TPS) is…

P1870 ISUZU Transmission Component Slipping

Possible causes – Trailer towing may set code– Check transmission fluid level– Internal transmission fault Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1870 ISUZU OBD Code Description

P0689 ISUZU Engine Controls Ignition Relay Feedback 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 Tech description Check all the ECM fuses, if the fuses are OK try replacing the ECM relay. Symptoms – Engine Light ON (or…