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.
2021 Lexus NX 300 Base, FWDFACTORY OEM SERVICE PROCEDURE
Engine Control System - Diagnostic Codes (7 Of 9)
- SFI System
- DTC P0705-13: Transmission Range Sensor "A" Circuit Open; DTC P0705-62: Transmission Range Sensor "A" Signal Compare Failure [05/2019 - ]
- DTC P106C-62: Evaporative Emission System Pressure/Barometric Pressure Signal Compare Failure; DTC P106D-62: Evaporative Emission System Pressure Sensor - Turbocharger/Supercharger Boost Sensor Signal Compare Failure [10/2014 - 09/2015]
- DTC P106C-62: Evaporative Emission System Pressure/Barometric Pressure Signal Compare Failure; DTC P106D-62: Evaporative Emission System Pressure Sensor - Turbocharger/Supercharger Boost Sensor Signal Compare Failure [09/2015 - ]
- DTC P107A-11: Fuel Rail Pressure Sensor (Low) Circuit Short to Ground [10/2014 - 05/2019]
- DTC P107A-11: Fuel Rail Pressure Sensor (Low) / Fuel Rail Pressure Sensor "B" Circuit Short to Ground [05/2019 - ]
- DTC P107A-15: Fuel Rail Pressure Sensor (Low) Circuit Short to Battery or Open [10/2014 - 05/2019]
- DTC P107A-15: Fuel Rail Pressure Sensor (Low) / Fuel Rail Pressure Sensor "B" Circuit Short to Battery or Open [05/2019 - ]
- DTC P107A-2A: Fuel Rail Pressure Sensor (Low) Signal Stuck in Range; DTC P107A-64: Fuel Rail Pressure Sensor (Low) Signal Plausibility Failure [10/2014 - 09/2015]
- DTC P107A-2A: Fuel Rail Pressure Sensor (Low) Signal Stuck in Range; DTC P107A-64: Fuel Rail Pressure Sensor (Low) Signal Plausibility Failure [09/2015 - 05/2019]
- DTC P107A-2A: Fuel Rail Pressure Sensor (Low) / Fuel Rail Pressure Sensor "B" Signal Stuck in Range; DTC P107A-64: Fuel Rail Pressure Sensor (Low) / Fuel Rail Pressure Sensor "B" Signal Plausibility Failure [05/2019 - ]
- DTC P11EA-00: Bank 1 Air-Fuel Ratio Imbalance (Port); DTC P11EC-00: Cylinder #1 Air-Fuel Ratio Imbalance (Port); DTC P11ED-00: Cylinder #2 Air-Fuel Ratio Imbalance (Port); DTC P11EE-00: Cylinder #3 Air-Fuel Ratio Imbalance (Port); DTC P11EF-00: Cylinder #4 Air-Fuel Ratio Imbalance (Port); DTC P219A-00: Bank 1 Air-Fuel Ratio Imbalance; DTC P219C-00: Cylinder 1 Air-Fuel Ratio Imbalance; DTC P219D-00: Cylinder 2 Air-Fuel Ratio Imbalance; DTC P219E-00: Cylinder 3 Air-Fuel Ratio Imbalance; DTC P219F-00: Cylinder 4 Air-Fuel Ratio Imbalance [10/2014 - 09/2015]
- DTC P11EA-00: Bank 1 Air-Fuel Ratio Imbalance (Port); DTC P11EC-00: Cylinder #1 Air-Fuel Ratio Imbalance (Port); DTC P11ED-00: Cylinder #2 Air-Fuel Ratio Imbalance (Port); DTC P11EE-00: Cylinder #3 Air-Fuel Ratio Imbalance (Port); DTC P11EF-00: Cylinder #4 Air-Fuel Ratio Imbalance (Port); DTC P219A-00: Bank 1 Air-Fuel Ratio Imbalance; DTC P219C-00: Cylinder 1 Air-Fuel Ratio Imbalance; DTC P219D-00: Cylinder 2 Air-Fuel Ratio Imbalance; DTC P219E-00: Cylinder 3 Air-Fuel Ratio Imbalance; DTC P219F-00: Cylinder 4 Air-Fuel Ratio Imbalance [09/2015 - 09/2017]
- DTC P11EA-00: Bank 1 Air-Fuel Ratio Imbalance (Port); DTC P11EC-00: Cylinder #1 Air-Fuel Ratio Imbalance (Port); DTC P11ED-00: Cylinder #2 Air-Fuel Ratio Imbalance (Port); DTC P11EE-00: Cylinder #3 Air-Fuel Ratio Imbalance (Port); DTC P11EF-00: Cylinder #4 Air-Fuel Ratio Imbalance (Port); DTC P219A-00: Bank 1 Air-Fuel Ratio Imbalance; DTC P219C-00: Cylinder 1 Air-Fuel Ratio Imbalance; DTC P219D-00: Cylinder 2 Air-Fuel Ratio Imbalance; DTC P219E-00: Cylinder 3 Air-Fuel Ratio Imbalance; DTC P219F-00: Cylinder 4 Air-Fuel Ratio Imbalance [09/2017 - 05/2018]
- DTC P11EA-00: Bank 1 Air-Fuel Ratio Imbalance (Port); DTC P11EC-00: Cylinder #1 Air-Fuel Ratio Imbalance (Port); DTC P11ED-00: Cylinder #2 Air-Fuel Ratio Imbalance (Port); DTC P11EE-00: Cylinder #3 Air-Fuel Ratio Imbalance (Port); DTC P11EF-00: Cylinder #4 Air-Fuel Ratio Imbalance (Port); DTC P219A-00: Bank 1 Air-Fuel Ratio Imbalance; DTC P219C-00: Cylinder 1 Air-Fuel Ratio Imbalance; DTC P219D-00: Cylinder 2 Air-Fuel Ratio Imbalance; DTC P219E-00: Cylinder 3 Air-Fuel Ratio Imbalance; DTC P219F-00: Cylinder 4 Air-Fuel Ratio Imbalance [05/2018 - ]
- DTC P1235-13: High Pressure Fuel Pump Circuit Open [10/2014 - ]
- DTC P125A-12: Fuel Flow Control Valve Circuit Short to Battery [10/2014 - ]
- DTC P125A-14: Fuel Flow Control Valve Circuit Short to Ground or Open [10/2014 - ]
- DTC P125D-71: Fuel Flow Control Valve Performance Actuator Stuck [10/2014 - 09/2015]
- DTC P125D-71: Fuel Flow Control Valve Performance Actuator Stuck [09/2015 - 05/2019]
- DTC P125D-71: Fuel Flow Control Valve Performance Actuator Stuck [05/2019 - ]
- DTC P1378-00: Pre-ignition Detected [10/2014 - 09/2017]
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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