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.
2018 Lexus GS 450h BaseFACTORY OEM SERVICE PROCEDURE
Engine Control System (Diagnostic Codes & Circuit Tests)
- SFI System
- DTC P0016: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A); DTC P0018: Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A) [09/2016 - ]
- DTC P0606: ECM / PCM Processor [09/2016 - ]
- DTC P0017: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor B); DTC P0019: Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor B) [09/2016 - ]
- DTC P0340: Camshaft Position Sensor Circuit Malfunction; DTC P0342: Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor); DTC P0343: Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor); DTC P0345: Camshaft Position Sensor "A" Circuit (Bank 2); DTC P0347: Camshaft Position Sensor "A" Circuit Low Input (Bank 2); DTC P0348: Camshaft Position Sensor "A" Circuit High Input (Bank 2) [09/2016 - ]
- DTC P0037: Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2); DTC P0038: Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 2); DTC P0057: Oxygen Sensor Heater Control Circuit Low (Bank 2 Sensor 2); DTC P0058: Oxygen Sensor Heater Control Circuit High (Bank 2 Sensor 2); DTC P0141: Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 2); DTC P0161: Oxygen Sensor Heater Circuit Malfunction (Bank 2 Sensor 2); DTC P102D: O2 Sensor Heater Circuit Performance Bank 1 Sensor 2 Stuck ON; DTC P105D: O2 Sensor Heater Circuit Performance Bank 2 Sensor 2 Stuck ON [09/2016 - ]
- DTC P0087: Fuel Rail / System Pressure - Too Low [09/2016 - ]
- DTC P0088: Fuel Rail / System Pressure - Too High [09/2016 - ]
- DTC P011B: Engine Coolant Temperature / Intake Air Temperature Correlation [09/2016 - ]
- DTC P2195: Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1); DTC P2196: Oxygen (A/F) Sensor Signal Stuck Rich (Bank 1 Sensor 1); DTC P2197: Oxygen (A/F) Sensor Signal Stuck Lean (Bank 2 Sensor 1); DTC P2198: Oxygen (A/F) Sensor Signal Stuck Rich (Bank 2 Sensor 1) [09/2016 - ]
- DTC P2102: Throttle Actuator Control Motor Circuit Low; DTC P2103: Throttle Actuator Control Motor Circuit High [09/2016 - ]
- DTC P0136: Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2); DTC P0137: Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2); DTC P0138: Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2); DTC P0139: Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2); DTC P013A: Oxygen Sensor Slow Response - Rich to Lean Bank 1 Sensor 2; DTC P013C: Oxygen Sensor Slow Response - Rich to Lean Bank 2 Sensor 2; DTC P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2); DTC P0157: Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2); DTC P0158: Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2); DTC P0159: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2) [09/2016 - ]
- Circuit Tests
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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