Hello all. Lately, after driving for about a half hour, my ABS light has been coming on. If I restart the truck, it goes off.
When I pull codes, I'm getting a P1635.
I do have oversized tires on the truck, but have had them this way for years, with no code.
Has anyone else had this problem before?
Im thinking I will try reinstalling my tune, to see if that would help for some reason.

 

Just wanted to update.
Got to the point where my ABS light would stay on, and I would have no anti-lock brakes. I would hit a bump while slowing down, and you would feel the abs kicking in, on dry pavement.
To my surprise, autozone had a code reader that pulls ABS codes. Came back as a left front wheel speed sensor. I just ordered a new one, and will post back after I get around to installing it.

 

Nice to know Autozone has that ability. Hope it fixes. It.

 

That did the trick. No light, and everything works good again.
Anyone else needing to do this sensor, here you go.
Pull wheel, remove caliper and caliper mounting bracket, take off rotor, remove Allen screw holding sensor into hub, pull out, and disconnect harness. Done.