I posted a while ago about issues with my ESP activating when it shouldn't, and I'm still having issues. I found a TSB for reprogramming, got the dealership that I bought it from to cover the flash, and it still didn't resolve the issue. Then I had an issue pop up where the ETC light would flash and the truck would go into fail safe mode. I think I have that issue straightened out now, so back to the ESP.

The ESP activates when I make turns, sometimes when I make turns from a complete stop, and sometimes when I make a rolling turn. It seems to happen more so on tight turns. Any ideas? What sensors are monitored to activate the ESP? I'm assuming the wheel speed sensors, but I want to make sure. Any help is appreciated.

 

Do you have stock wheels and tires?

 

Now I feel like an idiot, because this is the first time that I've looked at that. The wheels are stock, but the tires are not. The dealership put new 255/70R18 on and stock (according to the door sticker) is 265/60R18. So, the ones they put on are almost 2inches larger in diameter, and almost a half inch narrower. And that's most likely a big enough difference to cause an issue? Unless the truck is programmed to accept the different tire size.

 

I do not think the tire size will throw the TPS, but maybe someone here can verify or the dealer can check.