2009 freightliner cascadia with Webco ABS system, abs light on

Better yet I looked again and found your code:: excessive wheel slip. Check air gap on sensors. Doesn’t say which ones to check.You can try to push them in with a long flat punch. Not too hard as you don’t want to damage cable while doing it. Unless you just spun the wheels and caused the light to come on. If so it should go off after starting up and moving 5 + mph

 

Aside from a sensor needing to be pushed in. A bad sensor or cable to the sensor, a loose or bad wheel bearing can cause excess end play and knock the sensor away from the exciter ring. Something serious to check out if it doesn’t go away or keeps coming back on

 

Try pushing the fronts in they’re easy and can be changed w/o taking wheel off.I just had that on mine just pushed front one in. Also had a bad wire from RR to valve. After replacing sensor and aluminum bracket that holds sensor. They break easy. Look for broken wires. Mine showed excessive gap/ open circuit, was a bad wire

 

You know there’s a button or switch you can hit to get a blink code right? I assumed you already did that.

 

It might be the bearing.

 

WHAT? Bad locking nut on the bearing and wasn't fixed? How does a locking nut go bad? That's scary enough.