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.
2024 Infiniti QX55 EssentialFACTORY OEM SERVICE PROCEDURE
Engine Control System (2 Of 4)
DTC Index
| DTC | Description |
|---|---|
| P0139 | HO2S2 |
| P014C, P014D, P015A, P015B | A/F SENSOR 1 |
| P0171 | FUEL INJECTION SYSTEM FUNCTION |
| P0172 | FUEL INJECTION SYSTEM FUNCTION |
| P0181 | FTT SENSOR |
| P0182, P0183 | FTT SENSOR |
| P0190, P0192, P0193 | FRP SENSOR |
| P0191 | FRP SENSOR |
| P0196 | EOT SENSOR |
| P0197, P0198 | EOT SENSOR |
| P01F0 | ENGINE COOLANT TEMPERATURE |
| P0201, P0202, P0203, P0204 | FUEL INJECTOR |
| P0222, P0223 | TP SENSOR |
| P0234 | TC SYSTEM |
| P0235 | TC BOOST SENSOR |
| P0237, P0238 | TC BOOST SENSOR |
| P025B | FUEL PUMP MODULE A |
| P0261, P0264, P0267, P0270 | CYL1-4 INJECTOR |
| P0262, P0265, P0268, P0271 | CYL1 - 4 INJECTOR |
| P026B | INJECTION TIMING |
| P0300, P0301, P0302, P0303, P0304 | MISFIRE |
| P0315 | CRANKSHAFT POSITION |
| P0326 | KNOCK SENSOR 1 B1 |
| P0327, P0328 | KS |
| P032B | Knock/combustion vibration sensor3 bank1 |
| P032C | Knock/combustion vibration sensor3 bank1 |
| P032D | Knock/combustion vibration sensor3 bank1 |
| P0335 | CKP SENSOR |
| P0340 | INTAKE CAMSHAFT POSITION SENSOR |
| P0365 | EXHAUST VALVE TIMING CONTROL POSITION SENSOR |
| P0420 | THREE WAY CATALYST FUNCTION |
| P0441 | EVAP CONTROL SYSTEM |
| P0443 | EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE |
| P0444, P0445 | EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE |
| P0447 | EVAP CANISTER VENT CONTROL VALVE |
| P0448 | EVAP CANISTER VENT CONTROL VALVE |
| P0451 | BAROMETRIC PRESSURE SENSOR A/B |
| P0452 | EVAP CONTROL SYSTEM PRESSURE SENSOR |
| P0453 | EVAP CONTROL SYSTEM PRESSURE SENSOR |
| P0454 | EVAP SYS PRES SEN |
| P0456 | EVAP CONTROL SYSTEM |
| P0460 | FUEL LEVEL SENSOR |
| P0461 | FUEL LEVEL SENSOR |
| P0462, P0463 | FUEL LEVEL SENSOR |
| P0500 | VSS |
| P0506 | ISC SYSTEM |
| P0507 | ISC SYSTEM |
| P050A, P050B, P050E | COLD START CONTROL |
| P0520 | EOP SENSOR |
| P0524 | ENGINE OIL PRESSURE |
| P052A | INTAKE VALVE TIMING CONTROL |
| P052B | INTAKE VALVE TIMING CONTROL |
| P0531 | A/C REFRIGERANT PRESSURE SENSOR |
| P0532 | A/C REFRIGERANT PRESSURE SENSOR |
| P0533 | A/C REFRIGERANT PRESSURE SENSOR |
| P0573 | Brake pedal switch A |
| P05EC, P2B95 | COLD START CONTROL |
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.