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Unread 08-12-2013, 10:43 AM   #1
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2005 WK 
Join Date: May 2012
Location: Providence, ri
Posts: 4
2005 jeep wk (cel) error codes p0300 & p0406

Hi All,
My check engine light just came on. Error codes are 300 & 406. I know that 300 is a random cylinder misfire & 406 relates to the EGR valve. Just wondering if anyone has experience with BOTH of these codes triggering at the same time. I bought the car with 70k, now has 85k, and thought there was a tune-up performed at 60K but can't find the receipt from the previous owner.

I just disconnected the battery to reset the CEL and will wait to see what happens.

Engine seems pretty smooth, gas mileage seems the same as when I bought it. Every once in a while though when I start it up, put it in drive, and give it gas it delays for a very brief second and it's barely noticeable.

So, I figure I may just need a tune-up but thought I'd check if anyone here has run into these two codes. Thanks!!!

2005 Jeep GC 4.7

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