kingkoopa Posted January 20, 2014 Share Posted January 20, 2014 I got rid of my error code p0401 (insufficient flow) by just replacing my egr valve, temperature sensor, and vucuum modulator. I have another problem, now I have a new error code p0402 (excessive flow). I've look on youtube and the web for answer to the problem, no luck. It says to use same method as p0401, to clean valve. I skip the cleaning part by puchcasing aftermarktet parts and check light still on. What else could be wrong. My error code reader gave me only one error code which is p0402. Anyone with experience in this area, please help!!!! Quote Link to comment Share on other sites More sharing options...
Toyota Owners Club Posted January 22, 2014 Share Posted January 22, 2014 I have seen people suggest it could be the DPFE sensor for this error code Quote Link to comment Share on other sites More sharing options...
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