Wheel Bearing replaced - ABS AVC light now on

Hi all,

Previous post on grinding noise - ended up being a front bearing. After bearing replaced the driving is perfect but ABS AVC light comes on every once in a while. Did some searching and seems to be an issue others have come across before.

So - is there any consensus solution for the ABS light issue after changing a bearing?

Thanks,
Rob

 

Ok - this is driving me nuts...

To recap - my 08 prius had grinding noises, my local mechanic replaced the left front bearings and the grinding noises went away. The problem however is the ABS warning light now comes on, mostly when I go over 45 mph or so. The mechanic has reset the warning light, but it still keeps coming up with a "debris" code. Took it to the shop again this morning and he took it apart to make sure it was clean etc. but when I drove away the ABS light came back on. It is a new ABS sensor. In all I believe he as "reset" the warning light three times.

This morning the mechanic mentioned that there was a "rubber boot" that might be causing the problem and said that if the light comes back on he suggested removing this rubber thing. That no other ABS he's seen has a rubber boot like this and it might be catching rust etc. I then drove away and the ABS light came on again.

I stopped later at a pep boys and they wanted $144 just to look at it. No idea what a dealer would want. Money is an issue, Christmas is coming and I've already spent more than $500 on this.

So - looking for advice: Should I let the mechanic take off this rubber boot thing? Take it to pep boys friday morning to give them a shot at fixing it?

Also wanted to point out - the car is running just fine and braking with no problem. Just want to get the ABS right for the winter.

Thanks for any and all help,
Rob

 

Thanks for the reply - not sure what you think I am ignoring.

- I've had the mechanic reset the warning lights with his computer - this has been done at least three times. As I understand it, this is the same thing as the paperclip trick.
- I told the mechanic about the "holes lining up" - and he did this the second time he had it in the shop. This was in response to the post mentioning the "cup" before.

So what didn't I try? I am not mechanically gifted so I have to rely on talking to my mechanic

Thanks,
Rob

 

Its a cable about a foot long with a "gadget" at the end with rubber cover.

I ended up scheduling pep boys for tomorrow morning - want a second set of eyes to look at it. Kind of ticked off that it is going to cost me another $144 tho.

 

Another update.

Took the car to Pep Boys (PB). They checked it and wanted $1500 to fix. Basically most of the front drivers side being redone. Told PB that with Christmas coming, couldn't afford it. Guy took pity on me I guess and told me that this was the "PB corporate answer" and that he was sure the only thing wrong (off the record) is that it needed torqued down and that I needed a new castle nut and cotter pin. Learning this cost me $145.

Went back to my mechanic and told him all of this - he says PB doesn't know what to fix, so they are just going to replace everything. He took the advice of the PB guy and torqued the wheel again. I believe from 90lbs to 100lbs. Told me to come back on Monday if the ABS light comes back on.

And I screwed up before - it is not a "boot" but rather a CUP that he is referring to. He says it is for dust, but rather than the dust going out to nowhere, it is getting caught up near the sensor. His theory is that there is rust hitting the magnet sensor and setting off the ABS light and that this cup doesn't really do anything. Sorry for the confusion, but like I said before - I really don't know anything about cars.

My mechanic said that it is safe. When I drive it, it is smooth as glass. No vibration, nothing. Braking is great. If it weren't for the ABS light, I would think it was perfect.

I drive for lyft so I went out for a few hours - no ABS lights except at the end when I went over 60mph. For two hours I drove downtown Pittsburgh with no ABS light - on the way home hit 60+ mph and the light went on. This was yesterday.

Today I drove again for two hours and the same - no problem slower speeds, get on the highway at 60+ and the ABS goes off.

So this is driving me nuts.

I found this document
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=2ahUKEwjT9uXZwIDmAhVCo1kKHVeIAekQFjAAegQIARAC&url=https%3A%2F%2Fattachments.priuschat.com%2Fattachment-files%2F2017%2F08%2F131028_Frontwheelhub.pdf&usg=AOvVaw3SI0aQJzhfZ6fXLVEv83bt

and this link


SOLVED: Front axle nut torque specs for 07 prius - Fixya


That mentions some torque. Could the be that it is possibly under-torqued?

Once again thanks to everyone for helping on this and if you have any ideas please let me know. If this helps anyone else, that would be great.

Rob