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
DTC Index
DTC INDEX
| DTC | Description |
|---|---|
| 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.