Check Engine Light
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Check Engine Light
I have had a engine light coming on and off for about a year now. The code reads P0404. I have changed everything. I am still getting this light. the car runs great. I don't understand it. Has anyone had this problem. Need to solve this. Thank You.
The code P0404 is often not a problem with the EGR valve itself. Rather, the EGR Valve Position Sensor is telling the PCM that there isn't the correct amount of EGR to flow back into the combustion process to sufficiently cool the peak firing temperatures. Once the code P0404 has been retrieved with a scan tool, the freeze frame data should be documented and analyzed in order to determine what engine conditions were present when the code was triggered. It is recommended that the vehicle be driven in such a way as to duplicate the code setting conditions with a data streaming scan tool connected, so the behavior of the EGR Valve Position Sensor, actuating components and feedback sensors can be monitored.