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post #31 of (permalink) Old 10-24-2016
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Here is a link to a post I put together in my mod thread - it shows what I did to fix this problem on my car (common issue on these cars). It only costs $11 for each one of the replacement pigtails - then you just need to cut the old wire and splice in the new pigtail. Pretty easy job, actually and it definitely fixed this issue for me:

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

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post #32 of (permalink) Old 10-24-2016
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Quote:
Originally Posted by jtrosky View Post
Here is a link to a post I put together in my mod thread - it shows what I did to fix this problem on my car (common issue on these cars). It only costs $11 for each one of the replacement pigtails - then you just need to cut the old wire and splice in the new pigtail. Pretty easy job, actually and it definitely fixed this issue for me:

JT's 2012 Impala LT Mod Thread - Page 40 - Chevy Impala Forums

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Where did you get the pigtail for $11? When I was looking for these I could only find Harness for about $30-40.
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post #33 of (permalink) Old 10-24-2016
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While I usually try to stay with AC-Delco parts, since the OEM wires failed so soon, I decided to go with aftermarket in this case - especially since it's just a piece of wire...

They actually went down in price since I bought them. I paid $22 for 2 harnesses - now they are only $18 for 2! :-) You can also buy them separately for ~$10. This is what I purchased and I was very happy with the quality - seemed even better than the AC-Delco wires:

http://www.ebay.com/itm/Pair-of-Wire...-/291709860390

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post #34 of (permalink) Old 11-04-2016
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Originally Posted by jtrosky View Post
Can you tell if it's a traction-control-type noise (not sure if you are familiar with traction-control and what it sounds/feels like when it kicks in)?

Personally, I think I'd start by replacing the front-right speed sensor harness. I just replaced the front-left one on my 2012 Impala because at certain sharp right turn bends (after straightening the wheels back out after the sharp bend), my traction-control would kick in repeatedly and it was had to get teh car to accelerate when it happened.

I replaced the front-left (drivers side) ABS wheel speed-sensor pigtail because this is a well-known, very common issue with these cars. The wiring breaks (or at least gets damaged) over time from all of the wheel-turning (and because of the short factory wiring).

Yu can get a set of 2 pigtails on ebay for $22 shipped. If the issue normally happens during (or after) right-hand turns, you replace the left and vice-versa.

Definitely seems to have solved the issue for me. Before I replaced it, I also tested the wiring resistance while messing with the wire and sure enough, when I bent the wire a certain way, the resistance went crazy - so the wire was definitely damaged somewhere under the wiring insulation. There are thread about this issue all over the forums.

Again, this is assuming that the noise you are hearing is, in fact, the traction-control kicking it...

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So could somebody confirm and clarify this for me: My 2012 Impala made the noise when I would stop and turn left on slow turns and I could hear a grinding/click/jamming noise, along with my TCS light kicking in and blinking. Multiple mechanics checked my wheel hubs and could not find anything.

AS SOON AS I TURNED OFF MY TCS SYSTEM WITH THE "TCS OFF" BUTTON ON THE LEFT OF MY STEERING WHEEL I NEVER HEARD THIS NOISE AGAIN.

And so this is what I have been doing so far and no noise. But since I'd like to have my TCS activated like a normal daily driver,

My question is: seeing as I have narrowed down this problem to most likely TCS, is it safe to say that replacing the wheel hub speed sensor pigtail would cure the problem ( maybe a break in there)?

And if so does this mean that that pigtail not only includes a speed sensor, but is also wired to the TCS system and gives feedback on when it should kick in?

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post #35 of (permalink) Old 11-04-2016
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Quote:
Originally Posted by AKM47 View Post
So could somebody confirm and clarify this for me: My 2012 Impala made the noise when I would stop and turn left on slow turns and I could hear a grinding/click/jamming noise, along with my TCS light kicking in and blinking. Multiple mechanics checked my wheel hubs and could not find anything.

AS SOON AS I TURNED OFF MY TCS SYSTEM WITH THE "TCS OFF" BUTTON ON THE LEFT OF MY STEERING WHEEL I NEVER HEARD THIS NOISE AGAIN.

And so this is what I have been doing so far and no noise. But since I'd like to have my TCS activated like a normal daily driver,

My question is: seeing as I have narrowed down this problem to most likely TCS, is it safe to say that replacing the wheel hub speed sensor pigtail would cure the problem ( maybe a break in there)?

And if so does this mean that that pigtail not only includes a speed sensor, but is also wired to the TCS system and gives feedback on when it should kick in?

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Yes, it definitely sounds like replacing the pigtail will solve your problem - your symptoms are exactly the same as mine were - and it's a known issue with these cars. Basically, the wire breaks underneath the wire insulation - so there is no way to "see" the issue just by looking at the wires.

If you get the issue while turning left, then it's probably your passenger-side that has the issue.

Just buy the pigtails I lined to above, cut the old pigtail off and splice in the new pigtail. I haven't had the issue at all since I did this on my car - if definitely solved the issue for me.

You could also have autozone check for ABS-related codes to see if there are any stored codes - may confirm that it's the passenger or driver side.

The wire is the link between the comptuers and the speed sensor - if the wire is broken (or damaged), it sends the computer bad data at certain times. This is what causes the ABS to kick in.

Check this post for more details, including some pictures from when I replaced my drivers-side pigtail:
https://www.impalaforums.com/showthread.php?p=2942562

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post #36 of (permalink) Old 11-04-2016
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Awesome. I will end up lifting my ride and replacing both because it did happen once when turning to the right, and these are so cheap it makes sense to get them both in shape.

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post #37 of (permalink) Old 11-08-2016
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Originally Posted by AKM47 View Post
And if so does this mean that that pigtail not only includes a speed sensor, but is also wired to the TCS system and gives feedback on when it should kick in?
The speed sensor is part of the hub, not the pigtail. The pigtail only includes the wire & plug that plugs into the speed sensor in the hub. It's a lot of work to replace the hub and many did this before replacing the pigtail only to find it didn't fix the problem. The pigtail or harness is cheap and easy compared to the hub. Most parts stores have the harness as it's called there for $30-40 but Jtrosky provided an Ebay link to an oem harness for around $10 which I'd buy if mine act up. Just my FYI.
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post #38 of (permalink) Old 11-08-2016
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I ordered the pigtails on ebay. and I understand what your saying. but considering what trosky said which is the 12' impalas are common on the pigtails being a bit short and stretching then breaking, it really does match my problem exactly. My TCS doesn't kick on everytime I turn, but when it does, I even had two moments where the ABS activated while I turned the wheel in place (stopped) and then jammed up so bad I couldn't move the vehicle when I hit the gas. So it seems like a short in the wires because they maybe so shot. I had pros look at my wheels, take off the wheels check for metal on metal contact, check for play, and they were baffled as to what can make that noise which was very hard to reproduce by the way. TCS lighting up when that noise comes, and having random service stabilitrak messages pop up once a year sounds electrical to me.

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post #39 of (permalink) Old 11-08-2016
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It's either a wheel speed sensor going out or the wiring harness. The symptoms you all report are exactly what happens when the wheel is sending inaccurate reports and the car thinks the misreporting wheel is slipping or locking so it activates TCS, ABS, or stabilitrek to "fix" the wheel's condition, depending upon the situation.

If your hubs haven't been off recently, and they aren't particularly old, I'd say it's the pigtails. If that doesn't fix the issue then start looking into replacing your hubs. Duly note, getting those hubs out isn't easy, and they're known to break on the way out. So if you ever plan on taking them off for some reason, you'll probably have to replace them.
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post #40 of (permalink) Old 04-01-2017
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Just an update on this issue, ABS pigtail ordered on ebay and replaced. The issue has been solved. Thank you guys for your help.

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post #41 of (permalink) Old 04-22-2017
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Just goose it !

Quote:
Originally Posted by stckwthmy3.5 View Post
Ynohtnoj, I have a similar problem. every so often when I turn the wheel to take off out of a parking spot my driver side wheel will grind and it feels like the wheel is stumbling and my traction light will start to flash. Is my problem anything like yours?

Ive also took my car in and have been told every time that my car is ok.
Mine doesn't do it if i "goose" it a little. I drive grandpa speed all the time, and the mechanics drive like race car drivers, that's why they couldn't duplicate the noise. More RPM are needed for quiet shifting and stabilitrac operation.
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Front end grinding noise? - Chevy Impala Forums This thread Refback 07-14-2015 02:46 PM
Thread Front End Whirring Noise? | Overclockers UK Forums | BoardReader This thread Refback 08-27-2013 10:01 AM

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