ESP/BAS Traction light - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 8 (permalink) Old 01-03-2015, 07:44 PM Thread Starter
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ESP/BAS Traction light

so im new to the newer jeeps and i just bought a 2009 jeep commander 4.7 limited. i was driving back home (170 mile trip) it was snowing pretty hard and the roads where pretty snowy and i looked at my dash and noticed the ESP/BAS light on as well as the traction control symbol. what could this be? i did a bit of research on this and am gonna look at the wheel speed sensors tomorrow. im not 100% sure where they are so if anyone has pics that would be great. also i read that it could be dirt packed around the fuse box? what do you guys think about that... sorry for the crappy grammar, i love the jeep i just dont like amber lights on the dash :P thanks all
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post #2 of 8 (permalink) Old 01-04-2015, 07:55 AM
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Was it on the whole drive or just a short period?
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post #3 of 8 (permalink) Old 01-04-2015, 08:46 AM Thread Starter
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It was about half way though the trip it tuned on and it stayed on
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post #4 of 8 (permalink) Old 01-04-2015, 05:36 PM
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Check for codes doing the key dance, unfortunately the key dance only spits out a small portion of the stored codes, usually the OBDII mandated codes and major engine or transmissions codes. So a stored code for a fault in the ESP/BAS might NOT show, I have had codes set for sensors in the system before, so its worth a try.

There is a switch on the center panel to turn off some of the traction control features, that should only light the traction control light on the dash. So, you likely have something wrong with the BAS/ESP.

The biggest part of the ESP/BAS is the brakes, so check over your brakes and makes sure there is nothing wrong with the brakes, including brake fluid level.

The wrong size tires or a mismatch in tire sizes can cause the light.

Fuses can blow and take out modules of the system, and cause the light to light.

Yes bad sensors, and there are wheel sensors, can cause the problem.

There is a fuse box under the driver side dash as well as two under the hood.

When I took out my dash to include the steering column, to replace the ac evaporator, I blew a fuse for the steering column that disabled the steering angle sensor, and lit the ESP/BAS light. When I replaced the blown fuse it went out.
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post #5 of 8 (permalink) Old 01-04-2015, 09:15 PM Thread Starter
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I had one tire about 5 or 6 psi higher then the rest last night so I let some air out and today when I went for a drive the lights turned off before I got to the end of the street..... ops check good I guess. I'll updated if the lights turn back on
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post #6 of 8 (permalink) Old 01-04-2015, 10:57 PM
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Ok... because I am totally new to traction control systems I am going to ask:
Doesn't the system come on in the event you need traction control? For example, slippage on snowy roads where one tire might be getting less grip than the others and the computer 'senses' it causing the system to function?

I am not being facetious here, legitimately asking the question.

Dave
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post #7 of 8 (permalink) Old 01-05-2015, 12:46 AM
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Quote:
Originally Posted by Mk153smaw View Post
Ok... because I am totally new to traction control systems I am going to ask:
Doesn't the system come on in the event you need traction control? For example, slippage on snowy roads where one tire might be getting less grip than the others and the computer 'senses' it causing the system to function?
That is how the system operates, but the lights come on the dash as a warning that the system detected a fault and it might not work properly or at all.

The ESP/BAS light on the dash is a warning it is NOT operating properly. The system will activate without lighting any lights.

One tire having significantly more pressure than the others might cause problems. Unless you've got pressure down to 28psi, I doubt 6psi would make enough of an overall diameter difference to cause the lights to go on. But, if they went out after evening the tire pressure, keep your fingers crossed, hopefully that is all it took.
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post #8 of 8 (permalink) Old 04-18-2017, 09:36 PM
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Anyone find a fix for this issue?

08, Commander, Overland, 5.7L HEMI, QD-II, Stock.
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