Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2017 Lexus GX 460 BaseFACTORY OEM SERVICE PROCEDURE
Engine Control System (Diagnostic Codes) (4 Of 7)
- SFI System
- DTC P0451: Evaporative Emission Control System Pressure Sensor Range / Performance; DTC P0452: Evaporative Emission Control System Pressure Sensor / Switch Low Input; DTC P0453: Evaporative Emission Control System Pressure Sensor / Switch High Input [08/2018 - 08/2019]
- DTC P0451: Evaporative Emission Control System Pressure Sensor Range / Performance; DTC P0452: Evaporative Emission Control System Pressure Sensor / Switch Low Input; DTC P0453: Evaporative Emission Control System Pressure Sensor / Switch High Input [08/2019 - 08/2022]
- DTC P0451: Evaporative Emission Control System Pressure Sensor Range / Performance; DTC P0452: Evaporative Emission Control System Pressure Sensor / Switch Low Input; DTC P0453: Evaporative Emission Control System Pressure Sensor / Switch High Input [08/2022 - ]
- DTC P0455: Evaporative Emission Control System Leak Detected (Gross Leak); DTC P0456: Evaporative Emission Control System Leak Detected (Very Small Leak) [08/2015 - 08/2017]
- DTC P0455: Evaporative Emission Control System Leak Detected (Gross Leak); DTC P0456: Evaporative Emission Control System Leak Detected (Very Small Leak) [08/2017 - 08/2019]
- DTC P0455: Evaporative Emission Control System Leak Detected (Gross Leak); DTC P0456: Evaporative Emission Control System Leak Detected (Very Small Leak) [08/2019 - ]
- DTC P0461: Fuel Level Sensor "A" Circuit Range / Performance [08/2019 - ]
- DTC P0462: Fuel Level Sensor "A" Circuit Low; DTC P0463: Fuel Level Sensor "A" Circuit High [08/2019 - ]
- DTC P0500: Vehicle Speed Sensor "A" [08/2015 - 08/2019]
- DTC P0500: Vehicle Speed Sensor "A" [08/2019 - ]
- DTC P0504: Brake Switch "A" / "B" Correlation [08/2015 - 08/2019]
- DTC P0504: Brake Switch "A" / "B" Correlation [08/2019 - ]
- DTC P0505: Idle Control System Malfunction [08/2015 - 08/2022]
- DTC P0505: Idle Control System Malfunction [08/2022 - ]
- DTC P050A: Cold Start Idle Air Control System Performance [08/2015 - 08/2018]
- DTC P050A: Cold Start Idle Air Control System Performance [08/2018 - 08/2022]
- DTC P050A: Cold Start Idle Air Control System Performance [08/2022 - ]
- DTC P050B: Cold Start Ignition Timing Performance [08/2015 - 08/2018]
- DTC P050B: Cold Start Ignition Timing Performance [08/2018 - 08/2022]
- DTC P050B: Cold Start Ignition Timing Performance [08/2022 - ]
- DTC P0550: Power Steering Pressure Sensor Circuit Malfunction; DTC P0552: Power Steering Pressure Sensor Circuit Low Input; DTC P0553: Power Steering Pressure Sensor Circuit High Input [08/2015 - ]
- DTC P0560: System Voltage [08/2015 - 08/2019]
- DTC P0560: System Voltage [08/2019 - ]
- DTC P0604: Random Access Memory (RAM) [08/2015 - ]
- DTC P0606: ECM / PCM Processor [08/2015 - ]
- DTC P0607: Control Module Performance [08/2015 - ]
- DTC P060A: Internal Control Module Monitoring Processor Performance [08/2015 - ]
- DTC P060B: Internal Control Module A/D Processing Performance [08/2015 - ]
- DTC P060D: Internal Control Module Accelerator Pedal Position Performance [08/2015 - ]
- DTC P060E: Internal Control Module Throttle Position Performance [08/2015 - ]
- DTC P0617: Starter Relay Circuit High [08/2015 - 08/2016]
- DTC P0617: Starter Relay Circuit High [08/2016 - 08/2019]
- DTC P0617: Starter Relay Circuit High [08/2019 - ]
- DTC P062F: Internal Control Module EEPROM Error [08/2015 - ]
- DTC P0630: VIN not Programmed or Mismatch - ECM / PCM [08/2015 - 08/2017]
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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