EGR Temperature Sensor: Description and Operation

EGR Temperature Sensor:

The EGR Temperature Sensor serves to verify EGR Valve operation. This is done by monitoring the exhaust passage temperature down stream of the EGR valve. To confirm that the EGR valve is functioning properly, the ECU expects to see an increase in temperature at the EGR temperature sensor whenever the EGR valve is commanded to be operating. In the event of a malfunction the ECU will set a code and turn the Check Engine Light "on".