JasonJ:
Thank you for the quick reply. I was hoping it would be a simple muffler issue.
It runs well otherwise. There is no hesitation, no misfiring, acceleration is fine.
I don't know when the 430 code showed up but I have noticed that during the last two tanks of gas my average mileage has...
I have P0420 and P0430 codes on my 2007 KJ. The 420 code came up 2 years ago while it was still under the 80k mileage and the dealer told me to run Techron through a few tanks to clear the code. Well, that failed and their response was 'oh well, you're over the mileage now'. So, here I am...
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