Possible causes – High fuel pressure– Low fuel pressure– Damaged FRP sensor– Excessive resistance in the circuit– Low or no fuel– Wiring harness connector of the fuel pressure sensor– Fuel Rail Pressure Sensor– Vacuum leaks– Fuel Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Engine will not start P0191 ISUZU OBD Code…
Tag: ISUZU
P1631 ISUZU Immobilizer Wrong Signal
Possible causes – Immobilizer control unit failure-ECM failure– Poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P0299 ISUZU Turbocharger Engine Underboost
Possible causes – Induction air leakage– Sticking turbocharger nozzle control solenoid– Low fuel pressure condition– Faulty boost pressure sensor Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P0171 ISUZU Fuel Trim System Lean Bank 1
Possible causes – Intake air leaks– Faulty front heated oxygen sensor– Ignition misfiring– Faulty fuel injectors– Exhaust gas leaks– Incorrect fuel pressure– Lack of fuel– Faulty Mass Air Flow (MAF) sensor– Incorrect Positive Crankcase Ventilation (PCV) hose connection Tech description If the P0171 is combined with the P0174 code, it’s very likely that the problem…
P2440 ISUZU Secondary Air Injection System Switching Valve Stuck Open
Possible causes – Faulty Vacuum Switching Valve (VSV)– Vacuum Switching Valve (VSV) harness is open or shorted– Vacuum Switching Valve (VSV) circuit poor electrical connection– Faulty Pressure Sensor– Faulty Air Switching Valve When is the obd code mean? If the Engine Control Module (ECM) receives the pulsation signal from the sensor despite the ECM ordering…
P0123 ISUZU Throttle Position Sensor 1 High Voltage
Possible causes – Faulty throttle position sensor– Throttle position sensor harness is open or shorted– Throttle position sensor circuit poor electrical connection When is the obd code mean? An excessively high voltage from the Throttle Position Sensor (TPS) is sent to Engine Control Module (ECM). Symptoms – Engine Light ON (or Service Engine Soon Warning…
P1121 ISUZU Throttle Position Sensor Circuit Lower Than Expected
Possible causes – Faulty Throttle Position Sensor– Throttle Position Sensor harness is open or shorted– Throttle Position Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P1122 ISUZU Throttle Position Sensor Circuit Higher Than Expected
Possible causes – Faulty Throttle Position Sensor– Throttle Position Sensor harness is open or shorted– Throttle Position Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P0121 ISUZU Throttle Position Sensor 1 Performance
Possible causes – Faulty throttle position sensor– Throttle position sensor harness is open or shorted– Throttle position sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the obd code mean? Sensor input voltage does not fall within a valid range based on engine speed and load Symptoms – Engine Light ON (or…
P0223 ISUZU Throttle Position Sensor 2 Circuit High Voltage
Possible causes – Faulty Throttle position sensor– Throttle position sensor harness is open or shorted– Throttle position sensor poor electrical connection When is the obd code mean? An excessively high voltage from the Throttle Position Sensor (TPS) is sent to Engine Control Module (ECM). Symptoms – Engine Light ON (or Service Engine Soon Warning Light)–…