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Old 05-19-2013, 10:04 PM   #1
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ESC light staying lit

Put a new lift on last week. Got the Jeep aligned the next day.

I noticed today that the ESC light is staying on. I'm usually pretty observant about alerts on my instrument cluster so I have to think that this just started today.

She's driving fine, just the light won't go off.

Some threads have mentioned aligning the steering wheel. Not sure how that would even matter as I don't see how the system would know or care about that. Well, my wheel was off a bit after the alignment so I fixed that today....light is still on.

Anything else I need to do/try before I go to the dealership tomorrow?

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Old 05-19-2013, 11:05 PM   #2
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What about tires? Did you go up in size? If so, it could have something to do with the following.

This from the AEV FAQ's on their ProCal:

"The ESP system uses vehicle speed along with individual sensors that measure acceleration both front-to-rear and side-to-side. ESP functions by calculating how much steering angle the user inputs and how fast the vehicle is going, and then calculates how much side-to-side acceleration should occur. If the side-to-side acceleration is less than what the ESP predicts, that means the vehicle is sliding and it will try to correct the situation by applying specific brakes at each wheel and/or reducing throttle.

If the tire size and gear ratio values are incorrect, the calculations the ESP system processes will also be incorrect. This can cause the ESP system to trigger at the wrong time, which at best can be annoying and if it happens at the wrong time (or doesn’t happen when it should) can be dangerous. Lifted vehicles are more prone to inadvertent ESP activation, because the speedometer is wrong or the steering wheel isn’t centered. The ProCal will allow you to fix these issues so your ESP can function properly."

It could also be something as simple as an uplugged sensor.

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Old 05-19-2013, 11:12 PM   #3
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I would start by checking what codes it is throwing. That may point to a sensor.
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Old 05-19-2013, 11:14 PM   #4
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Tires are the same. Haven't upgraded them, yet.

As for a sensor being unplugged, how do I check that?

How would I go about getting the error code(s)?
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Old 05-19-2013, 11:28 PM   #5
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I would first read the codes. I purchased a code reader. Others on the forum may have advice about purchasing a device like an AEV Procal or other programming device as I think you may also be able to read codes with those. My code reader is the Innova. Just connect it and read the codes, a simple tool. The reason I got it is just for cases like this one. Eventually I think I am going to spring for the AEV Procal. I'm interested in possibly changing some of the settings on the computer to experiment.
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Old 05-19-2013, 11:30 PM   #6
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I found out how to look up the codes (if any). Will go try it shortly.
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Old 05-20-2013, 08:33 AM   #7
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My procal tells me the steering wheel is straight so we can rule that out.

Ugh. Guess I'm headed to the dealership in a few.
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Old 05-20-2013, 08:37 AM   #8
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Might be a wheel speed sensor, but I think that would also throw an ABS light.
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Old 05-20-2013, 08:38 AM   #9
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I tried the key trick to get error codes to show but apparently I'm too stupid to get that to work. LOL
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Old 05-20-2013, 09:04 AM   #10
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Quote:
Originally Posted by Jag View Post
Might be a wheel speed sensor, but I think that would also throw an ABS light.
Yes... All 3 lights will be illuminated if a sensor is broke.
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Old 05-20-2013, 09:05 AM   #11
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Well crap. Don't like going to the dealership but guess I don't really have a choice.
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Old 05-20-2013, 09:23 AM   #12
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If you drove around for a week with the steering wheel off center that is probably what is setting off the traction control. Yes the Jeep knows the positioning of the steering wheel. It uses that information to correct for oversteer and understeer. It will probably just take some driving to get the light to go off as the computer needs to see that the wheel is now straight.
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Old 05-20-2013, 09:26 AM   #13
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Quote:
Originally Posted by COLOUJK View Post
If you drove around for a week with the steering wheel off center that is probably what is setting off the traction control. Yes the Jeep knows the positioning of the steering wheel. It uses that information to correct for oversteer and understeer. It will probably just take some driving to get the light to go off as the computer needs to see that the wheel is now straight.
Alignment was done the next day after the lift. Everything was fine. Light only came on yesterday. And procal says the wheel is centered.
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Old 05-20-2013, 09:29 AM   #14
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Alignment was done the next day after the lift. Everything was fine. Light only came on yesterday. And procal says the wheel is centered.
I am just saying that the computer can take some time to understand that. Especially since in your first post you said you drove it with the steering wheel off center for about a week.
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Old 05-20-2013, 09:33 AM   #15
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Quote:
Originally Posted by COLOUJK View Post

I am just saying that the computer can take some time to understand that. Especially since in your first post you said you drove it with the steering wheel off center for about a week.
I see now what you meant

That being said, doesn't the procal just mimic what the computer is thinking. Meaning, since the procal says the wheel is centered, doesn't that mean the computer thinks the wheel is centered?
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Old 05-20-2013, 10:55 AM   #16
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Well crap.

Was driving to the dealer and the light went out about a mile from my house. Maybe it fixes itself. Fingers are crossed.
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Old 05-20-2013, 02:23 PM   #17
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hmm... Might have had to relearn something... if it comes back on, You wont be in any worse condition i'd guess. Bring it in if it comes back
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Old 05-20-2013, 02:24 PM   #18
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Yes. Very odd. Now I'll be holding my breath for the next few weeks every time I start it. LOL

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