2005 jeep wk (cel) error codes p0300 & p0406
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