EGR Temp Sensor P1401 - Testing and Replacement

How to test and replace an EGR Temperature Sensor P1401. This sensor detects temperature changes in the EGR passage way. The sensor does not control the engine. It is used for on board diagnosis.

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The EGR Temperature Sensor detects temperature changes in the EGR passage way. When the EGR valve opens, hot exhaust gases flow, and the temperature in the passage way 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.

P1401 -An excessively low voltage from the EGR temperature sensor is entered to the ECM OR an excessively high voltage from the EGR temperature sensor is entered to the ECM.

Note:
This video is being performed by an experienced tech. Any attempt to repair automotive parts and/or systems carries risk of personal injury. Always adhere and follow safe practices when working on vehicles. Such as, use safety glasses, jack stands, no loose clothing, etc. No guarantee or warranty is implied. Use the information in this video at your own risk. If you don't think you can perform the job then be smart and don't. Carsntoys is a member of the Amazon Influencer Program.

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EGR Temp Sensor P1401:
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