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post #1 of (permalink) Old 09-01-2016, 01:31 PM Thread Starter
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No Power Steering or Stabilitrak

So I have a 2014 Impala 2LT (45,000 miles) that has the Overkill Tune (91/93), Cold Air Intake and 80mm Throttle Body. Everything has been working great for the last 3-4 weeks (Other than slight surging at startup which Will said he can resolve) until the other day when I turned a corner and the "Service Stabilitrak" came up, ABS Light and No Power Steering.

I used the Autocal to see if I can read any codes and none come up. I was able to select "Clear DTC Codes" which I did even if nothing showed up and it resolved the issue TEMPORARILY. I started the car and got about one block away and it happened again.

I have been researching online as to what the problem could be and its driving me nuts. I have read that it can be a wheel speed sensor, a MegaFuse and possibly the throttle position sensor.

Looking to see if anyone has had this issue and what the problem could be. I know I can go to the dealer and have them scan it for $$ but trying to avoid this if possible. I emailed Will to see if he can help and am waiting to hear back from him. I'm thinking it may be the 80mm throttle body?? I may put the stock throttle body on to eliminate the Overkill one.....Thoughts?

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post #2 of (permalink) Old 09-01-2016, 02:03 PM
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Besides the "no power steering" part, this sounds like an issue with the wheel speed sensor wiring. I just had to fix the same issue (it's a VERY common issue on these cars) on my 2012 at ~45k.

Each time this happens you also lose your power steering though??

The problem with the wheel speed sensors is that the wiring that goes to the hub is too short - so after turning the wheels enough, the wire inside the insulation breaks - and during turns, when the wiring gets pulled, the connection breaks.

If you normally have the happen when turning right, then it's an issue with the drivers side wiring. If you get it when turning left, it's the passenger side wiring.

This is, of course, assuming that it's the wiring... Unfortunately, there is no easy way to tell that the wiring is "bad" by just looking at it. In my case, when testing with a multimeter, I found that when I bent the wiring in a certain location (right by where it was secured to the frame of the car), the multimeter would go nuts - so that was a pretty clear sign that the wiring was the problem.

You can get replacement wheel speed sensor "pigtails" dirt cheap off of Ebay - just simply cut the old off and solder in the new one. Not very hard to do - and very inexpensive (~$25 for 2 pigtails).

Here is a link to the post I recently made about this, which includes some pictures of the wiring that you need to replace:

http://www.impalaforums.com/recent-m...ml#post2942562

There is also another post where I originally brought the issue up - let me see if I can find the link...

EDIT: Here it is:
http://www.impalaforums.com/showthread.php?t=1383297





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post #3 of (permalink) Old 09-01-2016, 02:27 PM Thread Starter
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I lose the electronic power steering when this all happens. At low speeds it has no power steering but seems to be a little better the faster you go. I was going to swap out the throttle body thinking it might be the "Drive by Wire" causing the issue but do not want to go through the trouble if I don't have to. I actually just made an appt at the Chevy dealer to see if they can at least scan it for me. Since it is an ABS code I cannot scan it and their scanner should tell me exactly what sensor and/or problem...Hopefully!

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post #4 of (permalink) Old 09-01-2016, 05:49 PM Thread Starter
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Well I was lucky enough to have a buddy with a scanner for the ABS. It showed code C0045 left wheel speed sensor. Looks like I won't be going to the dealer and can repair myself.. Now to order the part from RockAuto.

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post #5 of (permalink) Old 09-01-2016, 06:32 PM
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Originally Posted by 1FastImpala View Post
Well I was lucky enough to have a buddy with a scanner for the ABS. It showed code C0045 left wheel speed sensor. Looks like I won't be going to the dealer and can repair myself.. Now to order the part from RockAuto.
Please understand that a wheel speed sensor code can be caused by a broken/intermittent wire from the speed sensor.

I recommend jacking the car up, removing the (corresponding) wheel, and removing the wheel speed sensor wires from the loom and inspecting them for breaks and chafing.

I can't say for sure about the 2014's, but the gen 7 and gen 8 cars had front end ABS wiring that was susceptible to breaking. Mostly what I've seen are breaks at the tie downs - the plastic clips that hold the loom tend to pinch it and cause chafing and breaking of the inner wires at the tie downs.

If you buy new wheel bearings and then later discover that the problem is actually broken wires...well, you won't be the first person to make that mistake

Doug

(Are the 2014's gen 8 or gen 9?)

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post #6 of (permalink) Old 09-01-2016, 06:39 PM Thread Starter
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I plan on ordering the complete sensor assembly. Should be plug and play. I'm not replacing the wheel bearing.

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post #7 of (permalink) Old 09-01-2016, 06:39 PM
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You know, I mistakenly thought that this was for an 8th gen 2014 (old body style), but it's actually for a 9th gen 2014 (new body style). I'm not sure if the 9th gens have the same wiring issues as the 8th gens (I would hope not, but...).

So maybe it really is a bad speed sensor and not the wiring.

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post #8 of (permalink) Old 09-02-2016, 06:35 AM
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I never heard of this issue before and I am shocked. This sounds more like a recall type of issue.
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post #9 of (permalink) Old 09-02-2016, 06:42 AM Thread Starter
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I searched all of the TSB's for the impala and could not find one for this issue.

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post #10 of (permalink) Old 09-02-2016, 07:26 AM
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I wouldn't hold your breath for a recall, that's for sure - the issue has been present in the 8th gens for over 10 years and a recall was never issued! :-) And from what Doug says above, it sounds like it was also an issue with the 7th gens too!

The 8th gen issue really is dangerous when it happens too - it makes it so the car will no longer accelerate - so you could be in the middle of pulling out into traffic and then you car not moving like it's supposed to!

Luckily, it's an inexpensive and easy fix - and it comes on gradually over time, so you do have some "warning" that there is an issue. But still can be dangerous when it happens the first time unexpectedly.

Hopefully, for the 9th gens, this is just an isolated issue and won't be a common problem...

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post #11 of (permalink) Old 09-02-2016, 08:26 AM
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And from what Doug says above, it sounds like it was also an issue with the 7th gens too!
My son's 02 had the issue.

My 02 never had the problem, but it doesn't have ABS


Doug

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post #12 of (permalink) Old 09-02-2016, 08:38 AM
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Just got this notice for my car (never had the problem happen though). Might be worth looking into:
17200 ? Loss of Electric Power Steering (EPS) ? 2014 Chevrolet Impala | gm.oemdtc.com
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post #13 of (permalink) Old 09-03-2016, 12:37 AM
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Are the 15's on up safe from this? I hope so.

2015 Impala 2LTZ
Iridescent Pearl Tricoat
35% Ceramic tint all around
All options excluding adaptive cruise & 20" wheels
OEM Accessories: Splash guards, Wheel locks, Spoiler, Impala license plate frames and All weather floor mats with cargo mat
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post #14 of (permalink) Old 09-06-2016, 10:09 AM Thread Starter
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So after installing the new wheel speed sensor it still has the same problem. It was a 50/50 chance that it would solve the issue but now the only thing it could be is the Hub itself. After I pulled the wheel off you can see the corrosion from the salt, being that I live in the Midwest. I'm sure I can tackle the hub myself but at this point I just want the damn this fixed so I will be bringing it to the dealer. I'm sure if I spent some more time diagnosing the sensor itself I would have known it was the hub. Luckily the sensor only set me back $25.

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post #15 of (permalink) Old 09-08-2016, 02:35 PM Thread Starter
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Confirmed today from the dealer that the hub was the issue. I was also informed by them that both front struts are leaking which surprised me a little bit. I of course told them not to replace them since I can do that myself knowing that they are leaking. Just need to plan on doing more repairs I guess!!

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