Originally Posted by TravisCadello
code has been popping up few weeks now even after i clear it....what does the EGR temp sensor do?
It's used by the ECM to monitor the function of the EGR system. When the EGR valve opens and exhaust gas flows past the temperature sensor, it signals the ECM that the EGR valve is working. The sensor itself has no effect on driveability, it's used by the ECM for diagnosis only. If the sensor fails it won't cause the EGR valve to open at the wrong time or anything like that.