Had a shudder/shaking sometimes on my 01 Superduty. Found left front caliper was sticking. Took it to a shop and he replaced both calipers and pads. Picking it up after he was done and he asked if I had the ABS light on before the work was done and I said NO. He tried and tried to get the light off but it is still on. Codes are C1155 and C1158. I got home and checked the abs connector it seemed ok. Looked at the master cylinder and it was a little low but also noticed he did not put the cap back on(it was just sitting aside).
I kinda thought if he got air in the system....it would be a hard pedal but all works ok except for the ABS light. Will not go into how it shudders a little when stopping because he did not re-surface the rotors like I asked.
Any ideas?? Maybe I should go back thru and bleed the brakes again?? The abs sensor on the hug is approx. 3 years old. and have never had the abs light on.

 

Those codes definitely come up as an issue with the left front ABS sensor. Its entirely possible during the brake work it was bumped or otherwise jostled just enough to cause it to throw those codes.

I've heard (and read here) how on occasion those sensors seemingly fail for almost no reason--that could be in effect here now on your truck. It could also be a problem with the wiring harness connector----its not in the best locations to avoid water and such from the roadway.

 

Thanks...will go to NAPA and pick up one. I just figured since it was so far back in there and he never removed the rotor that the sensor should be good. One way to find out is to change it!!