P0153 TOYOTA HO2S21 Circuit Slow Response

Possible causes – Faulty Front Heated Oxygen Sensor Bank 2– Front Heated Oxygen Sensor Bank 2 harness is open or shorted– Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks– Exhaust gas leaks Tech description Replacing the Front Heated Oxygen Sensor Bank 2 usually takes…

P0152 TOYOTA HO2S21 Circuit High Voltage

Possible causes – Faulty Front Heated Oxygen Sensor Bank 2– Intake air leaks may be faulty– Exhaust gas leaks– Front Heated Oxygen Sensor Bank 2 harness is open or shorted– Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors Tech description Replacing the Front Heated Oxygen Sensor Bank…

P0172 TOYOTA System Too Rich Bank 1

Possible causes – Faulty front heated oxygen sensor– Ignition misfiring– Faulty fuel injectors– Exhaust gas leaks– Incorrect fuel pressure – Faulty Mass Air Flow (MAF) sensor When is the obd code mean? – Fuel injection system does not operate properly.– The amount of mixture ratio compensation is too large. (The mixture ratio is too rich.)…

P0175 TOYOTA System Too Rich Bank 2

Possible causes – Faulty front heated oxygen sensor– Ignition misfiring– Faulty fuel injectors– Exhaust gas leaks– Incorrect fuel pressure– Faulty Mass Air Flow (MAF) sensor When is the obd code mean? – Fuel injection system does not operate properly.– The amount of mixture ratio compensation is too large. (The mixture ratio is too rich.) Symptoms…

P0627 TOYOTA Fuel Pump Control Circuit Open

Possible causes – Faulty fuel pump relay– Fuel pump harness is open or shorted– Fuel pump circuit poor electrical connection– Faulty fuel pump control module (if applicable) Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0627 TOYOTA OBD Code Description The Engine Control Module (ECM) has detected an open or short in…

P0088 TOYOTA Fuel Rail System Pressure Too High

Possible causes – Faulty fuel pump– Blocked fuel filter– Faulty fuel pressure sensor– Fuel pressure sensor harness is open or shorted– Fuel pressure sensor electrical circuit poor connection– Faulty Fuel injector When is the obd code mean? The Engine Control Module (ECM) has determined that the fuel rail pressure is too high for a specific…

P0087 TOYOTA Fuel Rail System Pressure Too Low

Possible causes – Faulty fuel pump– Blocked fuel filter– Faulty fuel pressure sensor– Fuel pressure sensor harness is open or shorted– Fuel pressure sensor electrical circuit poor connection– Faulty Fuel injector When is the obd code mean? The Engine Control Module (ECM) has determined that the fuel rail pressure is too low for a specific…

P0141 TOYOTA HO2S12 Heater Circuit Malfunction

Possible causes – Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit fuse– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit open shorted to ground– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection– Faulty Engine Control Module (ECM) Tech description The…

P0452 TOYOTA EVAP System Pressure Sensor/Switch Low Input

Possible causes – Faulty Evaporative Emission System (EVAP) Pressure sensor– Evaporative Emission System (EVAP) Pressure sensor harness is open or shorted– Evaporative Emission System (EVAP) Pressure sensor circuit poor electrical connection Tech description There is factory service bulletin for the following Toyota models: 2003-2004 Toyota 4Runner2003-2004 Toyota Tundra2004 Toyota Camry2004 Sienna2004 Highlander2004 SolaraToyota Factory Service…

P0451 TOYOTA EVAP System Pressure Sensor Range/Performance

Possible causes – Faulty Evaporative Emission System (EVAP) Vapor Pressure Sensor– Evaporative Emission System (EVAP) Vapor Pressure Sensor harness is open or shorted– Evaporative Emission System (EVAP) Vapor Pressure Sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) Tech description There is factory service bulletin for the following Toyota models: 2003-2004 Toyota 4Runner2003-2004 Toyota…