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Old 02-01-2010, 01:23 PM   #1
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Check Engine Light / Battery temp sensor

I have an 2004 Wrangler and my check engine light came on. Stopped by the local Autozone and they plugged in thier computerizer and said it was my battert temp sensor?

Has anyone ever heard of this before? And where is it located?

Thanks for the help.

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Old 02-01-2010, 01:30 PM   #2
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The battery temperature sensor is mounted directly underneath the battery. If it's showing the battery is getting too warm, that should be checked into right away. A hot battery can be caused by being charged too rapidly to having shorted cells.

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Old 02-01-2010, 02:03 PM   #3
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^ yep, under the battery.

they aren't that uncommon to go bad and turn on the cel. also common for someone to be in there working on something and disconnect it and forget about it, or even more common is people get p.o'ed trying to disconnect it and it gets damaged. it can cause some weird running and electrical problems from that little sensor.
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Old 02-01-2010, 02:20 PM   #4
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Not to mention a missing battery temp sender could cause the alternator to charge the battery too hard/too fast & cause the battery to overheat & potentially come apart (explode). The PCM uses the info from that sender to control how fast the alternator charges the battery so problems like that don't happen.
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Old 02-03-2010, 09:33 PM   #5
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Thanks Guys, I will check it out. I removed the battery to replace the fender, and I do remember plugging it back in. Who knows maybe I forgot to plug it in. I will check it out and let you know.

Thanks for the help.
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Old 02-09-2010, 03:54 PM   #6
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AH HA, I found the problemo...... I didn't have the connector pushed all the way in until it clicked. I pulled out the battery and started to check the wires and the connector and when I pulled on the connector it just pulled apart. Put it back together and this time it "clicked" and the check engine light is now off.

Thanks all who had input. A job well done.
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Old 02-09-2010, 11:00 PM   #7
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good to hear, thanks for posting what happened.
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Old 07-04-2010, 03:19 PM   #8
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This is scary. It makes Jeep owner's look like bigots. Has anyone here even checked out the past Presidents. To think that you picked this one to make such a remark about really shows a nasty side. One that doesn't make me proud. As people like you have said to me in the past, "If you don't like it, Pick another country and MOVE!" He is YOUR President, so get over it.
"The danger to America is not Barack Obama but a citizenry capable of entrusting a man like him with the Presidency. It will be far easier to limit and undo the follies of an Obama presidency than to restore the necessary common sense and good judgment to a depraved electorate willing to have such a man for their president."
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Old 07-04-2010, 03:24 PM   #9
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You just chose to revive an old thread to comment about a respected member's signature? Wow.

By the way, I didn't vote for Obama...and he is NOT my president. I will not bow down to him, salute him, or shake his hand. And do you know why? Because this is America and I have that freedom, unless he and his crazy liberal administration try to take it away. Don't like it? Tough.
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Old 07-04-2010, 04:25 PM   #10
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Quote:
Originally Posted by junkjunk View Post
This is scary. It makes Jeep owner's look like bigots. Has anyone here even checked out the past Presidents. To think that you picked this one to make such a remark about really shows a nasty side. One that doesn't make me proud. As people like you have said to me in the past, "If you don't like it, Pick another country and MOVE!" He is YOUR President, so get over it.
I agree. Reviving an old thread to say something as dumb as that???....
How about we talk Jeeps?? or do I sense a troll??
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Old 03-22-2014, 04:27 PM   #11
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Just quick note for anyone. This batter temp sensor can cause the engine light to come on and throw cam/crank sensor problem. I have been chasing this for better part of 1 year. whenever I would go over hard bump is when this happened. I was pulling it all apart today and I saw the battery tray was pinching the wiring and causing a short. the wire was split causing a faulty ground. I chose to replace the whole sensor. This must be the ground for the cam sensor and the fuel system because when the fuel would get to e-line...the check engine light would go off. The car drove fine except when I would go over hard bumps causing this short and I would jiggle some wires and tada...no check engine light and it would be fine again...until another bump. LOL Today I finally found that root cause. stupid battery temp sensor...Chrysler is bunch of foolish engineers. The cam sensor will tell engine not to start ...so because this sensor is on same circuit as the battery temp sensor...the ECU thought it was problem with the cam sensor....thus disabling the engine start.

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