Chrysler Pacifica Luxury meets versatility in this mid-sized sport utility vehicle

double code 404 and 420

Old 11-27-2017, 06:28 PM
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Join Date: Sep 2011
Posts: 121
Default double code 404 and 420

ok i got this 05 pacifica 3.5L auto awd car and it had the cel on with 2 codes. p0420 and p0404
p0404 looks like a egr valve issue and p0420 has something to do with the cat. it also had a p0457 that was for the gas cap but i put on a different cap and the gas cap loose message is still on but they say it takes 3 drive cycles to self clear. i did not see it in the codes when i checked them after changing the cap and driving it 15 miles or so. but this is my question will the p0404 egr issues cause the cat to throw a code? the car has 105000 miles but i have had cars with way more miles and no cat issues. so what do you guys think the egr causing the cat issue? thanks
Old 11-29-2017, 03:46 PM
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Join Date: Sep 2009
Posts: 19

My 05 cat lasted about 98k miles but only thru a 420 code. With the amount of oil these engines burn I was surprised it lasted that long.
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