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.
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HOMESERVICE MANUALSINFINITI2019Q70 3.7 LUXE, AWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM (3.7L) (DTC/CIRCUIT DIAGNOSIS) (8 OF 9)
2019 Infiniti Q70 3.7 Luxe, AWD
Engine Control System (3.7L) (DTC/Circuit Diagnosis) (8 Of 9)
2019 Infiniti Q70 3.7 Luxe, AWDSECTION Engine Control System (3.7L) (DTC/Circuit Diagnosis) (8 Of 9)
- DTC Index
- DTC/Circuit Diagnosis
- 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
- DTC P2271: O2 Sensor
- DTC P2272: Heated Oxygen Sensor 2
- DTC P2273: Heated Oxygen Sensor 2
- DTC P2297: Air Fuel Ratio Sensor 1
- DTC P2298: Air Fuel Ratio Sensor 2
- DTC P2610: ECM Internal Timer
RENDER: 1.0x
NO RELATED
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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.