» » »

Chevrolet Q&A

Ask Your Question

2003 Chevrolet Impala Question: CHECK ENGING LIGHT ON REPLACED EGR LIGHT CAME BACK ON

 

Question

cleebill, 3.4L V6, Louisville, KY, December 16, 2013, 08:31
 Rookie

READ SOMETHING THAT SAID IT MAY BE CAUSED BY POWERTRAIN CONTROL MODULE HOW WOULD YOU CHECK THIS AND REPLACE SUCH ITEM

1 Answer
Flag This
  • Answer #1

    Tires Too (133 Answers) , Londonderry, NH - (603) 473-4287
    tires too December 16, 2013, 09:00
     Journeyman

    What are the Diagnostic Trouble Codes? Computer failures are not that common, it does happen, but not a primary cause.

    Flag This
  • Reply

    cleebill, December 16, 2013, 12:38
     Rookie

    401

    Flag This
  • Reply

    tires too, December 16, 2013, 15:44
     Journeyman

    A P0401 is an Insufficient EGR flow code. have you checked the EGR ports for carbon build up? You probably are not getting vaccum to the EGR valve.

    Reply
    Flag This