ABS, Brake and Traction control lights on upon startup.

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by h1ph0panonymous, Jun 8, 2025.

  1. h1ph0panonymous

    Joined:
    Oct 9, 2023
    106
    19
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    Location:
    Minnesota
    Vehicle:
    2014 Prius
    Model:
    Four
    I replaced both wheel hubs myself, this is a formal update, they both failed at the same time, I live in Minnesota and don’t normally wash the underside of my car after long drives on salty or snowy weather. The hubs were completely seized with rust, the dust shields were starting to lose its material where it mates with the hubs, had to use a full metal hand mallet (all I had) to walk it loose with 10 minutes of banging on it with that mallet in the limited wheel well space from behind it while I was in front of it (only had a 2 ton jack and stands so was working from the outside of the car), dont even get me started on the lower (closest to the ground) slide pins on both sides of the caliper brackets, that took a culinary torch, a whole can of WD-40, pliers, flat head screw driver and hammer to get out of the brackets on each side, took me an hour of twisting, torching and hammering it out with the flat head. Cleaned the housing of the slide pins with lots of WD40 baths and constant stroking of it with needle file, butchered the bushings to the lower slide pins but greased the hell out of them so they can last and function until I get new bushing and slide pins ordered. This was my first real repair job, with limited tools and time. The whirring sound is gone from the rear once both failed-at-the-same-time factory wheel hubs got replaced. The ABS speed sensor christmas hud lights still persist because I forgot to unclip the rear left ABS wheel speed sensor from the hub before going to town on it with the mallet, I had removed the housing on the connector so the wires got pulled straight out of the terminal crimps in the connector, I put them back in the connector as best as possible in their respective slot for their colored wires (black and white) but that didn’t work, cleaning it with electrical contact cleaner wont work either because they need to be re-crimped (although I could try but ChatGPT says that’s now how it works) so now I need to get a new ABS wheel speed connector and pigtail because I don't have the knowledge or tools how to open those connectors up and re-crimp the wires to the respective terminals inside of the connector. I’m hoping that’s the issue with the 1 and only code left (LH rear wheel speed sensor fault) and the wheel hub sensor itself isn’t bad on the new hub I got from rockauto, the right rear wheel hub ABS speed sensor code went away after replacing the hub and clearing DTC codes, but the left rear one didn’t, it’d be rare if it was the actual sensor or plug of the new wheel hub that caused the code to persist rather than the connector and what I accidentally had done to it.

    Only a 30 dollar mistake for my first real repair I think I did good.