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Old 10-09-2014, 10:01 PM   #1
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CEL NOOOOOOOOO

I was driving tonight normal cruising and my cel came on.. It's not running funny and the loopey idle still works , And I wasn't shifting crazy . So I get home plug in my ford racing diagnostic tool that came with my track-cal tune and got these (2) codes P0420 - Catalyst System Efficiency Below Threshold Bank 1 and the 2nd code was P0430 - Catalyst System Efficiency Below Threshold Bank 2..My only exhaust mods are the ford racing ~Boss style h-pipe with dumps open and flowmaster outlaws out the back.Same set up ive ran forever now! Has anyone had this prob at all? ive looked up older threads and other peoples cel's were due to the headers had a leak, or the tune didn't turn off there back o2 Sensors due to a off road x-h pipe....... Anyone have any ideas .....What do I do???????!!!!!!!!!!!!!!!!! lol I will clear the code tomorrow going to a carshow I hope it stays off and was just a freak occurrence
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Old 10-10-2014, 12:01 AM   #2
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is this a manual? i heard about this cel with the manuals, theres 40+ pages on that on allfordmustang site. Not to scare you but theres no exact fix for this, at least yours dont go into limp mode.
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Old 10-10-2014, 08:09 PM   #3
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Sounds like you need the updated tune. They released a revision not to long ago fixing this. Ford racing stated it will not hurt running with the cel on.

Call them on Monday and have them send you a new SD card.


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Old 10-11-2014, 01:12 PM   #4
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Quote:
Originally Posted by solscooter View Post
Sounds like you need the updated tune. They released a revision not to long ago fixing this. Ford racing stated it will not hurt running with the cel on.

Call them on Monday and have them send you a new SD card.


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I did that first thing yesterday right when they opened lol It was driving me crazy not knowing what the hell was going on! I just cleared my codes and am waiting on my new update tune! I asked to add a few more horses on it for me . I just got the small chuckle ...
But I don't remember what he said caused the cels other than just needed a update , he just kinda stumbled over his words but who cares as long as its fixed!! Thanks for the help!
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