Recently I've been getting the dreaded service ABS/Traction Control system warning lights on the dash.

I did the codes check and am getting code C1232 Left Fr Wheel Speed circuit open or shorted and code U 1064,
Loss of Communication with BCM.

Checked all my fuses, OK so far.

I had this happen about 6 months ago and cleaned my battery cables off, as there was a little corrosion. They are clean now.The problem went away back then, but is back now.
Any thoughts or pointing me in the next direction?

 

Did you check the sensor at the wheel????

 

your code may indicate one of the wheel speed sensors is either sending a bad signal or no signal. Start by checking the connections. The wheel speed sensors are integrated into the wheel bearing/hub assembly. The wire coming out of the back is the connection for the wheel speed sensors. Verify that the connector are not broken, damaged, or corroded in any way. Pay particular attention to the female end.

The wire coming out of the wheel speed sensor connects to and 18" jumper harness, then to the main harness. It is very common for people to have a weak female pin in one of those connections. If all of that checks out good, swap the jumper harness from side to side. For example if the left front is bad, swap it over to the right front. And install the good one from the right front to the left side. Then clear the trouble code. If the trouble code is now on the right side, you know the wire harness is the problem. If the code is still on the left side after swapping the jumper harnesses, you know the problem is inside the wheel speed sensors.
If all the wires check out good, it's time to take a trip to Auto Zone for a new set of bearings. You can buy replacement AC Delco bearing from your dealer if you want to, or get the exact same bearing in a different box for half the price (~$150) from Auto Zone, you decide. The bearings should be replaced in axel sets, so if your left front is bad, you have to replace the right front too. While you’re at it, this is a good time to upgrade the lug studs and add spindle ducts.

 

Trussme
Great info! I'll be checking it out; as you outlined in your post.
Thanks
Bill

 

I will get an intermittent wheel sensor code followed by the ABS and traction control codes after going over railroad tracks or hitting some major potholes or driving on a rough road-- Quite common---My pigtails are all clean and sensors were all fine---Somehow they just lose connection briefly on a major bump---

 

I had an intermittent problem like that and it turned out the wire inside the insulation on the wheel speed sensor pigtail was broken. Since it was inside the insulation it wasn't visible and made enough contact to work unless you hit a bump in road.

 

Hi!
With that problems I cleaned my 8 grounds conneectors and everything was OK after that.:o

 

Thanks for info! I have same problem and I have a questions:
The bearings should be replaced in axel sets, so if your left front is bad, you have to replace the right front too.[/QUOTE]

Why should I replace the right bearing too, if the wires taken out of the left bearing?

While you’re at it, this is a good time to upgrade the lug studs and add spindle ducts.[/QUOTE]
explain please more about this.

Thank you!!!