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.

2004 Infiniti QX56 AWDFACTORY OEM SERVICE PROCEDURE

Intake Air Temperature Sensor

Check resistance between mass air flow sensor terminals 5 and 6 under the following conditions.

RESISTANCE CHECKING CONDITION

Intake air temperature °C (°F)	Resistance kΩ
25 (77)	1.9-2.1

Fig 1: Locating Intake Air Temperature Sensor & Mass Air Flow Sensor

Courtesy of NISSAN MOTOR CO., U.S.A.

If NG, replace mass air flow sensor (with intake air temperature sensor).

Fig 2: DTC P0112, P0113 IAT Sensor - Temperature/Resistance Graph
Courtesy of NISSAN MOTOR CO., U.S.A.

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.