Asked by Jan 23, 2014 at 03:41 AM about the 2004 Chevrolet Malibu LT

Question type: Maintenance & Repair

I have a 2004 chevy malibu lt 3.5L V6
I used to get a P0401 code saying egr flow is insufficient, so i removed the engine head
and cleaned the egr passage as best as i could, it was completely packed before I
cleaned it. Then I put it all back together and reattached everything..I did have one extra
screw, I have no clue where it went, i looked for like a half hour, but im quite certain
everything is properly attached..
I then took a test drive and got an error code for P0430 "Catalyst System Efficiency
Below Threshold "

I should also note that under the ABS section on the trouble code check I got J2100,
not sure why but dont think it has anything to do with this.

Is it possible I did something wrong? or didnt reconnect something properly?

1 Answer

Tom Demyan

P0430 is caused by exhaust leaks, see if you can find where that screw went and inspect for exhaust leaks.

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