I set my 35s to that size and the speed was off vs gps using the torqs app. I got it dialed in to as close as I could. It came out to 34.something a few months later I got an ABS code C121D and the tech said it needs a new module.

I'm wondering if I had the wrong # it would have screwed up the module. I have read a new or used one have to be programmed with tire revs and vin #

Does the tire size change the ecu or abs module?

Thanks guys



For more details about my problem here is a post I made about it asking how to fix the module.
https://www.cumminsforum.com/forum/4...de-cd121d.html

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