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.
2020 Infiniti QX80 LimitedFACTORY OEM SERVICE PROCEDURE
Engine Control System (DTCS) (5 Of 5)
- DTC Index
- Engine (ECM)
- DTC P2135: TP Sensor
- DTC P2138: App Sensor
- DTC P219A: Air Fuel Ratio
- DTC P219B: Air Fuel Ratio
- DTC P219C: Air Fuel Ratio
- DTC P219D: Air Fuel Ratio
- DTC P219E: Air Fuel Ratio
- DTC P219F: Air Fuel Ratio
- DTC P21A0: Air Fuel Ratio
- DTC P21A1: Air Fuel Ratio
- DTC P21A2: Air Fuel Ratio
- DTC P21A3: Air Fuel Ratio
- DTC P2237: A/F Sensor
- DTC P2238: Air Fuel Ratio Sensor
- DTC P2239: Air Fuel Ratio Sensor
- DTC P2240: Air Fuel Ratio Sensor 1
- DTC P2241: Air Fuel Ratio Sensor 1
- DTC P2242: Air Fuel Ratio Sensor 1
- DTC P2251: A/F Sensor
- DTC P2252: A/F Sensor
- DTC P2253: A/F Sensor
- DTC P2254: Air Fuel Ratio Sensor 1
- DTC P2255: Air Fuel Ratio Sensor 1
- DTC P2256: Air Fuel Ratio Sensor 1
- DTC P2270: O2 Sensor 2 Bank 1
- DTC P2271: O2 Sensor 2 Bank 1
- DTC P2272: Heated OXGEN Sensor 2
- DTC P2273: Ho2S2
- DTC P2297: Air Fuel Ratio Sensor 1
- DTC P2298: Air Fuel Ratio Sensor 2
- DTC P2610: ECM Internal Timer
- DTC P26A3: Multi-Way Control Valve Motor
- DTC P26A5: Multi-Way Control Valve Position Sensor
- DTC P26A6: Multi-Way Control Valve Position Sensor
- DTC P26A7: Multi-Way Control Valve Position Sensor
- DTC P26AB: Multi-Way Control Valve
- DTC P2A01: O2 Sensor 2 Bank 1
- DTC P2A04: Heated OXGEN Sensor 2
- DTC U0101: Can Comm Circuit
- DTC U0113: Can Comm Circuit
- DTC U0122: Vehicle Dynamics Control Module
- DTC U0146: Can Communication
- DTC U0155: Can Communication (Combination Meter)
- DTC U1001: Can Comm Circuit
- DTC U1024: Can Comm Circuit
Factory Service Tools
Use the Manual With the Right Hardware
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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.