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Unread 02-08-2005, 09:40 PM   #1
krawlin
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2004 TJ Wrangler 
 
Join Date: Feb 2005
Location: Salt Lake City, UT
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coolant sensor bad??

The on board display on my 93 GC will flash coolant sensor bad every once in a while?? Where is the sensor so I can replace it? I is starting to drive me crazy.

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Unread 02-09-2005, 05:36 AM   #2
Meerkat
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If you look at your coolant recovery tank (on the passenger side fenderwell), you will see two "caps". One is for filling, the other has wires going to it. The one with wires is the coolant level sensor. You may not need to replace the sensor at all. You may just have a dirty or loose connection.

HTH
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Unread 02-09-2005, 06:21 AM   #3
marksto
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Had the same "coolant sensor" problem on my '94 a few years ago. It was intermittant and drove me crazy for a long time. I removed the sensor and inspected it, cleaned it, etc.. to no avail. Save your sanity - go to the dealer and buy a replacement like I did.
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Unread 02-09-2005, 07:21 AM   #4
jeepholic
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Quote:
Originally Posted by marksto
Had the same "coolant sensor" problem on my '94 a few years ago. It was intermittant and drove me crazy for a long time. I removed the sensor and inspected it, cleaned it, etc.. to no avail. Save your sanity - go to the dealer and buy a replacement like I did.
Every time this topic comes up it's the same story, some say to inspect and clean the unit and others say to replace it period.
To inspect and clean the unit should take about 10 minutes, it may save you a trip to the store and a few bucks and give you a feeling of slight accomplishment, changing every part that you think is bad may work fine, but Jeeps are pretty durable and some items are cleanable in some cases, example:
I clean my IAC and the results are great
I clean my O2 sensor and the results are great
I buff the haze right off my headlights with great results
I clean the coolant sensor with great results.
I have also changed about 20 other bad parts on the truck including axles and pulleys, starters, alts, injectors and a ton of stuff that was unsaveable.
It doesn't hurt to try to clean it and check the connection before replacing it.
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Unread 02-09-2005, 09:13 AM   #5
krawlin
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Thanks for the help
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Unread 06-17-2011, 04:01 PM   #6
Glued2aPost
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Coolant sensor bad fix: http://www.jeepforum.com/forum/f13/c.../#post11719192
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Unread 06-17-2011, 07:08 PM   #7
coralman
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The attack of the coolant sensor post,lol.
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Unread 06-17-2011, 11:35 PM   #8
Yekknom
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1994 ZJ 
 
Join Date: Mar 2011
Location: vancouver, wa
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lol this happened to me i replaced every damn sensor except that one and it turns out thats the only one that the jeep reads if its gone bad. and one of the coolant sensors was pretty much gone when i found it
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