2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

EGR Temperature Sensor

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

The EGR temperature sensor detects temperature changes in the EGR passageway. When the EGR volume control valve opens, hot exhaust gases flow, and the temperature in the passageway changes. The EGR temperature sensor is a thermistor that modifies a voltage signal sent from the ECM. This modified signal then returns to the ECM as an input signal. As the temperature increases, EGR temperature sensor resistance decreases.

This sensor is not directly used to control the engine system. It is used only for the on board diagnosis.

Fig 1: Identifying EGR Temperature Sensor
G00775717Courtesy of NISSAN MOTOR CO., U.S.A.

< Reference data > 

Fig 2: Reference Data Chart
G00775718Courtesy of NISSAN MOTOR CO., U.S.A.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
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  • • 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.