Recurring Wheel Speed Sensor Harness Problem

Craig Wright · Jun 22, 2019

For about 6 years, my 2013 Impala Limited LT has had a wheel speed sensor harness problem that causes my Stabilitrac light to come on randomly when I turn left.

It usually does it every morning when I pull out of my driveway. My driveway isn't very steep but I wonder if the weight of my car shifting onto that wheel within 10 seconds of me starting it up is causing it.

It will randomly make a weird noise and activate the warning light at other times when turning left, even on level ground.

I had the left front wheel bearing assembly and sensor replaced in February. The speed sensor harness was replaced in March. Before both of those things happened, my ABS warning light came on and wouldn't go off.

Two weeks ago, the Stabilitrac light started coming on again. Has anyone else had this problem?

1954 Chevy · Jun 22, 2019

Well, to test your theory about the 10 seconds, wait a minute before you back up. Since you've changed every thing on the left side to no avail, maybe the problem is on the right side.

Craig Wright · Jul 14, 2019

Unfortunately, the waiting did not work. I'm still having problems with the bearing assembly. It only happens when I turn left. I can hear and feel it just past the firewall on the left side of the car. I'm at a loss for a long-term fix.

jtrosky · Jul 14, 2019

*Usually*, when this happens when turning left, it is the right wheel harness that is the problem. Instead of replacing the hub, just replace the harness - it's very inexpensive and relatively easy to replace (does require soldering though).

Here is a post where I talk about it a little more, which a few pictures:

https://www.impalaforums.com/showthread.php?p=2942562

Hope that helps.

EDIT: You can get the harnesses dirt cheap on EBay. I used ones similar to this and the repair is still going stong years later:

https://www.ebay.com/itm/2x-ABS-Whe...or-Chevrolet-Buick-Cadillac/142965532016?hash=item214968e570:g:DbMAAOSwt6NbsEOH

or

https://www.ebay.com/itm/2X-ABS-Whe...hot=ag&sd=142965532016&itm=201662685178&pg=2047675&_trksid=p2047675.c100623.m-1

Sam Axe · Jul 28, 2019

This is exactly what's going on with my 8th gen 2013.
I hooked up the Tech II and it returned a code C0040.
Think I'll try the harness swap before replacing the wheel bearing.

Code C0040 has three separate suffixes. Sorry, I can't remember what they are, but the one I have is for an "erratic" Right Front Wheel Speed Sensor.

This would logically imply an intermittent short.

Recurring Wheel Speed Sensor Harness Problem

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