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.
2012 Infiniti QX56 AWDFACTORY OEM SERVICE PROCEDURE
DTC WORK SUPPORT Mode
| Test mode | Test item | Corresponding DTC No. | Reference | ||
|---|---|---|---|---|---|
| HO2S2 | HO2S2 (B1) P1146 | P0138 | |||
| HO2S2 (B1) P1147 | P0137 | ||||
| HO2S2 (B1) P0139 | P0139 | ||||
| HO2S2 (B2) P1166 | P0158 | ||||
| HO2S2 (B2) P1167 | P0157 | ||||
| HO2S2 (B2) P0159 | P0159 | ||||
| A/F SEN1 | A/FSEN1 (B1) P1278/P1279 | P0133 | |||
| A/FSEN1 (B1) P1276 | P0130 | ||||
| A/FSEN1 (B2) P1288/P1289 | P0153 | ||||
| A/FSEN1 (B2) P1286 | P0150 | ||||
| EVAPORATIVE SYSTEM | EVP V/S LEAK P0456/P1456(1) | P0456 | "DTC LOGIC " | ||
| PURG VOL CN/V P1444 | P0443 | "DTC LOGIC " | |||
| PURG FLOW P0441 | P0441 | "DTC LOGIC " | |||
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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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