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 MANUALSNISSAN-DATSUN2004ALTIMA S, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROL SYSTEM - 2.5LDTC P0127: IAT SENSORCOMPONENT INSPECTIONINTAKE AIR TEMPERATURE SENSOR

2004 Nissan-Datsun Altima S, Automatic

Intake Air Temperature Sensor

2004 Nissan-Datsun Altima S, AutomaticSECTION Intake Air Temperature Sensor

Check resistance between intake air temperature sensor terminals 3 and 5 under the following conditions.

TESTING CONDITION DESCRIPTION

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

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

Fig 1: Identifying Mass Air Flow Sensor
Courtesy of NISSAN MOTOR CO., U.S.A.

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.