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Hi all,
Got a PO420 and PO405 codes on my 2002 regal with the 3.8 and 106,000 miles.

Replaced egr valve twice in last two years to get the ck engine light to go off, and pass inspection, only to have it come back on two weeks later.

Replaced cat converter in 2006 due to it being red hot and loss of power.

Now, I have a slight hesitation upon accelerating and then it goes away,
But he codes are still there and as such can't pass inspection.

Cat converter does not get red hot any longer but in any case I need to get it inspected and it won't pass in its current condition.

Any advice is appreciated, thanks
 
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