@Firefiterp

Welcome.

Can't help with locating the video. Do you recall if it was a GM video or a YouTube or some such? What search criteria were you using?

Could you post exactly how your traction control has been giving you fits lately? Are there any Dash text errors? Any OBDII Scan Code Numbers? And exactly what has been happening on your car, what do you observe?

Can you provide specifics about: "I can shut off the traction control and that solves the issue" because you didn't really mention the exact trouble?

 

No error codes. Unless I shut the traction control off, it will activate on dry pavement from a stop. I am not gunning the engine to break the tires loose, but it brings my car almost to a complete stop which is frustrating and dangerous. The video wasn’t from GM, it was just from a mechanic.

 

Keeping this separate:

If your actual trouble is that when you turn ignition key to "on" the dash momentarily displays "Traction Control On" then some say to drive it until 'fully warm' and then manually turn off traction control using the normal dash button. And keep driving it awhile.

If traction control reappears, then use button to clear it again and do not shut off car right away keep driving a short while. When you turn off motor you want your traction control to still be off on its own.

Some say doing it this way can clear the hydraulic brake lines of odd little air bubbles. I did it a few years ago on my 2010 and after a couple times it stopped happening. Maybe coincidence.

Separate, if the brake fluid is low, or very old, or moisture contaminated then it can affect ABS which draws data from same wheel sensors used for traction control.

 

I have followed this procedure without results. The brakes are new all the way around and the lines have been flushed. Still doing it.

 

I had similar issue with my 2005 3.4 and my 2008 3.5 LT. It would come on randomly. Hubs and sensors were replaced with no change. Turned out to be transmission related on both vehicles.

Not saying this is your case, just putting it out there as a possibility.

 

That is what the video I was referring to went over. It showed how to replace the plastic disks in one of the modules attached to the transmission that crack and cause this issue.

 

You posted:
"but it brings my car almost to a complete stop which is frustrating and dangerous."

Is this the trouble you observe?
And is it the only trouble you observe?

If yes, we should be chasing the ABS system. In some cases ABS can trigger Traction Control text error.

ABS and Traction Control are married but also single. Under your hood, driver side firewall, you'll see the MC and the ABS Control Block (A bunch of brake lines rising then bending back down). This trouble 90% is related to that ABS Block. But you are saying your brakes are applying when when car is being driven. So I now question air bubbles unless they are in the ABS Block riser lines (mostly its not - but never say never).

I need to read something in order to finish this post.

 

I used my scan tool to activate the abs when I bled the brakes to make sure there were no air bubbles.

 

You also posted:
"I can shut off the traction control and that solves the issue."

I think this maybe points away from air in ABS (but I don't have a 2016 manual).

I still can't find the transmission video. If there are for some reason Traction Control parts inside the transmission it would be new to me. But I want to know.

I think it's time to manually mechanically inspect all 4 brakes plus the electric parking brake system looking for wear and binding.

Crazy stuff.

Has anyone heard anything about the ~2016~ electric parking brake being in a circuit that might interact with Traction Control?

 

@Firefiterp

Yep exactly.
Except in this case it's not soft braking.
In this case it sounds like the brakes are stopping the car.
Trying to get better info. 😫

 

The traction control activates on dry pavement while accelerating and almost brings the car to a stop.

 

Ok. Good to know. Thanks.

 

Yes. But how does it almost bring car to stop? It works by feathering brakes at wheels that meet its function criteria. So is it the brakes that almost bring it to a stop. I admitted I don't see how a circuit could allow or force this symptom. I'm really interested.

 

Yes, the brakes apply in rapid succession just like it would be trying to stop you on slick roads but it is during acceleration so when it does this it almost stops the car completely.

 

The following isn't perfect but everything is correct as far as it goes:

 

My understanding is that all four wheel hubs and all 4 wheel sensors were replaced. Plus wiring checked. So maybe there is trouble with the new parts. But even then, at least one wheel sensor must be reading a different wheel speed. The new hubs mean also have new encoder rings so can't be that. And it has to be a trouble with TCS specifically because turning off solves it UNTIL accelerating after a stop. I think you need to start over and revisit every bit of the TCS equipment and wiring all the way to Modules. Only other option is to have a transmission shop dig-in assuming there is some internal TCM connection.

Post #1:
"I have a 2016 Impala limited and my traction control has been giving me fits lately. I have changed wheel hubs and speed sensors and checked the wire harness all to no avail. I can shut off the traction control and that solves the issue but I get tired of doing that every time I start the car. "

---

"I saw a video, I don’t remember where, but it had a repair option that was part of the transmission where the little plastic fluid diverters in a module attached to the transmission can crack and lead to traction control activation. "

 

Last bit.

I don't find any interaction between electric parking brake and TCM so gonna back-burner that as likely a big 'no'

There has to be a weak or bad wheel speed sensor, or wiring issue for a wheel speed sensor. Then the system would get info that a wheel is not turning as fast.

 

So I default to my #19 and #20. I see no other likely cause. Do you have the complete manual and electrical for your vehicle?

Of course it's gonna be hand to hand combat so the manuals probably don't matter at this point.