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The Pontiac G6 was a midsize car that was produced by General Motors. It was introduced in 2004 for the 2005 model year to replace the Grand Am.

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Traction control light (and abs light)

Hello.

I recently had a traction control light coming on in my Pontiac G5 GT (didn't see a forum for G5). When the traction control light was on, the car would jerk when shifting gears (it's an automatic). After time, the abs light came on as well. At this point the jerking seemed to stop. I took it into the shop. They ran a test and said it was probably a bad wheel sensor. They replaced the bad wheel sensor and gave the car back. Within minutes, the traction control light came back on. No abs light this time, and the car doesn't seem to be jerking anymore. I took the car back in and they said the code was leading them back to the abs, meaning it's probably the abs module causing the problem. If so, it would need to be replaced. This will cost somewhere between $450 - $600.

I'm wondering if this all sounds right? Did they even fix anything the first time around? Thanks!

-Kyle

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Hi @kyleguy ,

Go to another shop for a second opinion on the codes. Try AutoZone , apparently they do it for free.

Did they give you the "faulty" wheel sensor part back when they replaced it?

You should always ask for the bad parts back when they are replaced. If only to prove they've done something. After all it is yours. They may have a stock of 'bad' parts available to give back, but that may be me just being cynical.

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Thanks, @jayeff . And no, they didn't give me the faulty sensor. I didn't think to ask. I understand cynical. It's hard not to be. I really hope I'm wrong in this case, but paying $275 only to find that the light is still on, and then being told it will probably cost another $450-600? I don't know. I'll swing by AutoZone in hope of getting some helpful information. If you think of anything else, please let me know. Thank you very much.

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@jayeff So I took it too O'Reilly. They scanned it and got back "C0561." I'm basically finding this about it:

"In the case of this GM code, the electronic brake control module (EBCM) is what disables the traction control system or the vehicle stability enhancement system. The code means the EBCM is receiving faulty data from other modules or is faulty itself."

That's essentially what the guy at O'Reilly thought as well. Said it could be a connection issue somewhere, or an issue with the module itself. He also said that the code was in the car's history, rather than showing up currently; although I have no idea what that means.

I'll also mention that the Check Engine light is on. The shop had told me this has to due with emissions, but that we don't test for that in Michigan, so it's not a problem.

In conclusion, I guess it sounds like the shop might be right that it has to do with ABS module? Whether or not the "faulty" wheel sensor actually needed to be fixed, I have no idea.

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@jayeff , @kyleguy if theres a problem with the EBCM it will not cast a ABS code or cause the ABS light to come on . So yes there was probably a wheel sensor gone . The reason the the light for the traction control was off when leaving the shop was because the mechanic reset the codes and it took a few minutes to launch the code again. Obviously the mechanic didn't take the car for a test drive to check his work . Poor practice on the mechanics part . As for getting the parts back I always return the old parts in the new parts box . I make a habit of it for 2 reasons . One the customer can see a new part was put on and can see the old warn out part and secondly this way I dont have to dispose of them myself

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Thanks, @jimfixer . So in your opinion, it's entirely possible that they did in fact fix a wheel sensor, which took care of the ABS light. And now the traction control light is still coming on due to a separate issue: communication with the EBCM, perhaps?

The strange thing is that the traction control light has been coming on for months now. I had it looked at a while back and the mechanic said it was probably a wheel sensor. I didn't have the money to fix it so I left it alone. The ABS light just recently came on, right before I took it to the shop. Them putting on a new wheel sensor fixed the ABS light, but not the traction control.

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I find the biggest problem with GM traction control is with the yaw sensor and the steering angle sensor. When the yaw sensor goes the vehicle will lock up the brake of the freewheeling side when turning hard to the left or right . when the steering sensor goes the steering wheel shudders when doing long slow curves however you mentioned a strong hard shift or jerk between shifts . This sounds like the throttle actuator. But before you get to excited about changing anything check the transmission fluid level . If the level is overfilled ,or low ,it can cause the transmission to shift odd and this can cause the traction control to throw an error code. you may want to check that before letting them change anything. Hope this helps

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Thank you so much, @jimfixer . Unfortunately, checking the transmission fluid level is outside my level of knowledge. It's a sealed unit on my car. I got my oil changed recently and they said it was time to change my transmission fluid. So it could be related? Regarding the throttle actuator, I'm back in the shop tomorrow morning. I'll ask them about that as well.

I also want to mention this: the TC light is never on when I first start the car. Yesterday I drove for about 3 minutes before in came on. Sometimes I start the car and sit for 30 seconds and then it comes on. Sometimes I sit for 2 minutes and then it comes on. It always comes on within 5 minutes or so, usually less. The only consistency I've noticed is that it seems to come on when idling: either sitting in my parking lot before leaving, or sitting at a red light. I don't think this is ALWAYS the case. It does come on while driving (so this could be red herring), but it does seem to mostly come on when idle. Thanks again!

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was this issue ever resolved ? I am currently having the same issue with my Pontiac Pursuit 2006 (G4)

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@kelley2018 Yes! It was finally resolved!

Have them test your solenoids. Apparently one of mine was out. They replaced it for about $90 and I haven't had a problem since. Unfortunately, I spent $500+ before I finally hired a mechanic who found the real issue. At least it's finally resolved though.

Of course, this might not be the issue you're having. I hope it is though. Good luck!

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I will try that for sure !

My traction control light keeps randomly coming on with the ABS light and if i don’t pull over right away to re start the car my power steering message comes on then the car starts jerking.

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I had the same issue tc light on , hard shifting , shaking when I stop or just at iddling 2007 G6 3.5 and what it was # 4 injector gone bad replaced it and lights in the dash and other issues are fixed.

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Thankyou..good answer, i never thought about that..

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Hi Kelly.

I had the same thing go wrong on my g6. After taking it to a shop here in my home town, and an hour and half later I was told it was my upper cam shaft sencer, witch is located on top of the engine on the passenger side. There are two side by side. One is for the lower and one is for the upper. I replaced the upper one and it fixed this issue. A few days later I replaced the lower one and if had no issue after. I looked around on the net and there was no info about this. Or even at the dealership. I hope this helps for anyone that is having this same type of issues with there G6.

Kim

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Thank you so much for the information. I will try this for sure. How much did it cost you in total ?

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No problem Kelly. I'm glad to pass this info on. In total I spent around $300. The two sencers cost me around 160.? So in the end $460. The stupid thing is . Not one mention anyplace about this problem. Doing a code scan does nothing but cost money on things that never needed to be replaced.

Sure hope this helps. One thing for sure I'll be spending about her 400 on CV shafts on both sides. The u-joints are now making noise.

Sucks ..!!! .

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I looked up symptoms of a bad camshaft sensor, and it sounds an awful lot like what I'm experiencing. If so, holy $@$*, it would be great to finally fix this problem. At the same time, it would leave me wondering, why have three separate shops and hundreds of dollars not been able to figure this out?

I realize you say there's no information about this online, but three shops not being able to detect this still seems strange, no?

Also, I realize I don't yet know if the cam shaft sensor is even the problem I'm having. Either way, I still have yet to find a mechanic that knows how to fix my car.

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(OP here) This is nuts. My traction control light is now back on months later. My car is also throwing a code for multiple pistons misfiring. The car is shaking, making crazy noises under the hood, jerking when shifting gears. The shop I took it to doesn’t know what is causing it; the same shop that replaced a transmission solenoid months back, which somehow got the TC light to stop coming on, until now. I’m so %#*@ tired of this.

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Hey.. want are u driving ? G6.?

And secondly what size of engine .

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Hey, @kpillman21 , thanks for the quick reply!

I'm driving a 2007 Pontiac G5 GT, 2.4L

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Okay... now I'm not sure if it's the same engine.. I drive the g6 with the 2.4l. Now I have had the same issues. What fixed my problems was replacing these two cylanoid that are on top of the engine on the passenger side . They are side by side. One is for the upper camshaft position. And the other is for the lower camshaft. I believe that is right. The upper one , when it starts to go, will affect the shifting. The lower will effect the way the car runs. After going to different shops. And only getting the response of ... can't find the problem. One mechanic did. And those to on the top of the engine were the problem. They are not all that much. And very easy to replace... give those a try and let me know if it works out for u.

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Oh, maybe I misunderstood the message you left above back in January: was it the solenoids you replaced or the camshaft position sensors?

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Camshaft position solenniods. Is correct.. sorry if I caused confusion.. . .

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