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Unread 06-14-2009, 08:42 AM   #1
Gramps
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ESP/BAS light on

I've had this light, along with the squiggly car, come on twice now in the last couple of weeks.

The first time I pulling up to a stop sign behind another car where the over grown vegetation makes it hard to see on coming traffic. He crept out, I crept up and "ding" the light came on. It stayed on all of the way to my next stop where I pulled into a tight diagonal parking space. The light went out after I got under way for the trip home.

The second time the wife and I were driving home from a short outing, we had just gotten threw a curve when it came on again and stayed on for the rest of the trip.

I checked for codes and none came up, then I did some searching on the net and found the two main causes for this on other cars with this kind of system were the Steering Angle Sensor and the Brake light switch.

Of course if the Steering Angle Sensor is bad it needs to be replace but I read that you could also reprogram it by cranking the steering wheel all the way left, then right and holding it in each position for 5 seconds or so before returning it to neutral. I gave that a shot, the ESP/BAS lights stayed on until I actually got under way on another trip and they went out within about 15 feet.

The commonality between the two occasions when the lights came on were that I was using the brakes and I was making a turn adjustment.

The commonality to the "fixes" was that when I backed out of the parking space I had to turned the wheels a hard left and a hard right just I had done after reading about the reprogramming.

I have no final conclusion on this yet. I have always suspected the non-adjustable brake light switch to maybe be the problem with my intermittent Cruise Control and with that being the cheaper or the two switches it will be the first one that gets replaced. And no, my brake lights do not stay on with the brake pedal released.

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Unread 06-15-2009, 05:37 AM   #2
JLink
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Hey Bob, remember this is one of things I complained about shortly after lifting mine. It has since gone away and come back and gone again. One thing I learned though is to always ensure I check my tires are properly inflated. It seems to go off more with lower tire pressure and has stopped entirely now that I I run my slightly higher than recommended. You may want to give this a try.
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Unread 06-15-2009, 03:36 PM   #3
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If I remember right yours did it right after the lift and taller tires. My pressures have been up around 41 - 43 with the temps above 70 F. I'm just "observing" for now, certainly not a crisis.
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Unread 06-20-2009, 07:56 PM   #4
Coasty161
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this happend on the jeep even before i had the lift put on...has happend again once in a while in the year and a half the lift has been on.
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Unread 07-11-2009, 09:12 PM   #5
caliro
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ESP, BAS & TC lights

Hi, Y'all,

I have had the three lights come on several times when just driving straight. The first time it happened, I was heading to MT and it happened on the highway in ND. Try finding a Jeep dealer in ND! They scoped it and said that the sensors were malfunctioning and would have to be replaced. I had them replaced about a month ago, and it's happening again. ARGH! The Jeep seems to drive fine, no problems driving it when the lights are on. I have a 2009 Jeep Patriot Sport E, 2WD, which I just bought in March.

Any ideas?
Caliro in the Twin Cities, MN
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Unread 07-12-2009, 03:21 PM   #6
yra
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Hey guys. My compass had the esp/bas & 4wd! lights come on randomly. Took it in and the dealer, changed some damaged wiring somewhere underneath, no lights since.
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Unread 07-14-2009, 06:29 AM   #7
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yea, this happened to me yesterday, I still have yet to find and answer to the problem...looking for more updates
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Unread 07-14-2009, 04:54 PM   #8
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Quote:
Originally Posted by yra View Post
Hey guys. My compass had the esp/bas & 4wd! lights come on randomly. Took it in and the dealer, changed some damaged wiring somewhere underneath, no lights since.
Thanks for the heads up. The wires running under the chassis on the drivers side don't have the best protection. Is that where they were?

Quote:
Originally Posted by cactus_jack View Post
yea, this happened to me yesterday, I still have yet to find and answer to the problem...looking for more updates
Are they still on or did they go out. Which lights, seems to be several combinations?
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Unread 07-14-2009, 07:24 PM   #9
cactus_jack
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just the ESP/BAS light. But it went off today....weird
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Unread 08-17-2009, 01:56 PM   #10
tbox
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this happened on our 09 compass this past saturday, right after we left the dealership (had to pick up our precious car care kit lol). was still on when we left the house again later that day, but went off after i hit the "ESP off" button. no issue since but will keep an eye on it.
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Unread 08-17-2009, 02:55 PM   #11
merlinTec
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Hi
This is covered under TSB 08-010-07 flash for steering angle sensor if you have codes C121A/ C2205
Regards,
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Unread 12-20-2009, 05:12 AM   #12
Gramps
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This happened on my MK back in June. The steering angle sensor, like Merlin suggested, is the likely problem.

It's done it twice again in the last 2 weeks after I slid off the ice into a snow bank and had to be towed out. The alignment has been off since then so when I take it in for that I'll see if I can get more info.

Attachment 96117
esnow-dec-9-09-010.jpg  
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Unread 12-23-2009, 07:11 PM   #13
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Up date. The light came on and I got it to turn off several times by turning the wheel full left and right. It's been miserable to drive since the slide off incident. No body damage but the steering has really been out of whack and lots of "clunking".

I finally got it to the shop today and they couldn't do an alignment because the Tie Rods and Lower Ball Joints/Control Arm Assemblies were shot and that would throw off the steering angle sensor, too. All fixed no more ABS/ESP light.

This happening for the first time back in June may have been an indication of the steering getting loose, I don't know for sure. If it was, having it winched out of a ditch from a 30 degree side angle finished them off.

If your lights keep coming on check the Ball Joints and Tie Rods. If they are not be the problem them check out the Steering Angle Sensor, but that's a $90 diagnostic fee.

The good news - my CV joints are doing fine since the RRO lift.
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