Exhaust Gas Recirculation Flow Insufficient Detected P401 Code. What Part Needs To Be Replace?


2 Answers

Hook Profile
Hook answered
Try and unplug then plug back in the EGR sensor.. If that doesnt fix it then you need to replace the EGR tube itself..
Rena Chisholm Profile
Rena Chisholm answered
Would check the gas cap first to make sure it is in good condition and nice and tight.
A reading of  EGR code sometimes comes up because of uneven gas to air ratio.
Always good to check the simple things first.  If you find a loose or bad gas cap and fix the problem, it could take a day or two for the light to go off.
If this doesn't work, refer to Khook's answer.

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