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Unread 06-04-2009, 09:33 AM   #1
SDT03GCOverland
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2003 WJ 
 
Join Date: Nov 2008
Location: Brandon, Florida
Posts: 252
Low Coolant Level Bogus Warning

I'm sure it's a no-brainer... I'm getting the annoying "Low Coolant Level" warning deal in my 03 Grand Overland. The level is CLEARLY not low. Sensor issue, right?

Anybody else experience and fix this?

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Unread 06-04-2009, 10:07 AM   #2
oldfamilyguy
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Join Date: Dec 2008
Location: oakville, canada
Posts: 791
had this with another make once but not on the wj. it was the coolant level sensor though and think its common enough on any make . it started off random then became permanent. sorry don't know of any sure test. maybe tweak the connector a bit first to see if its that.
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Unread 06-04-2009, 10:22 AM   #3
97DCZJ
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1997 ZJ 
 
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Veryy common. I bought my ZJ mid april, and it said the same thing. I replaced it with a used one (I probably should've just bought a new one) and for about 3, 4 weeks now it's been saying once in awhile "Bad Coolant Sensor"

That's all it is
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1997 Grand Cherokee Orvis: V8 5.2L, stock.
(Sold) 1998 Cherokee Sport: 4.0L I6, Stock.
(Sold) 1990 Cherokee: 4.0L I6, 4.5" Lift, 33" BFG's.
(Sold) 1997 Grand Cherokee Limited: V8 5.2L, 2" BB, 31" Dick Cepeks.
(Sold) 1999 Grand Cherokee Laredo: Build Thread; V8 4.7L, Stock.
(Sold) 1996 Grand Cherokee Laredo: Build Thread; V8 5.2L ,3.5" lift, 32" Tires
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Unread 06-04-2009, 11:03 AM   #4
Mickey_D
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1997 ZJ 
 
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Location: 40° 3'42.36"N 112° 2'16.73"W, Utah
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And I'm not sure if everyone realizes or not, but it's not talking about some sensor in the radiator or something. It's a float in your coolant recovery reservoir. I'm just not 100% sure whether unplugging it is enough to bypass it or if you have to short the connector pins. In other words, I can't remember if the float switch is NO or NC...
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Unread 06-04-2009, 11:18 AM   #5
97DCZJ
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or just replace it. it's prob 15-20 dollars at pepboys and a 2 sec job
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1997 Grand Cherokee Orvis: V8 5.2L, stock.
(Sold) 1998 Cherokee Sport: 4.0L I6, Stock.
(Sold) 1990 Cherokee: 4.0L I6, 4.5" Lift, 33" BFG's.
(Sold) 1997 Grand Cherokee Limited: V8 5.2L, 2" BB, 31" Dick Cepeks.
(Sold) 1999 Grand Cherokee Laredo: Build Thread; V8 4.7L, Stock.
(Sold) 1996 Grand Cherokee Laredo: Build Thread; V8 5.2L ,3.5" lift, 32" Tires
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Unread 06-04-2009, 11:25 AM   #6
97DCZJ
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Here ya go -

1: Locate Coolant Overflow Tank. The Little plastic piece that a wire plugs into is your Sensor.


2: Unplug the wire from the sensor


3: Pull out Sensor


4: Repeat steps backwards to replace with new sensor.
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1997 Grand Cherokee Orvis: V8 5.2L, stock.
(Sold) 1998 Cherokee Sport: 4.0L I6, Stock.
(Sold) 1990 Cherokee: 4.0L I6, 4.5" Lift, 33" BFG's.
(Sold) 1997 Grand Cherokee Limited: V8 5.2L, 2" BB, 31" Dick Cepeks.
(Sold) 1999 Grand Cherokee Laredo: Build Thread; V8 4.7L, Stock.
(Sold) 1996 Grand Cherokee Laredo: Build Thread; V8 5.2L ,3.5" lift, 32" Tires
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Unread 06-04-2009, 12:59 PM   #7
YJMCBoy
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Low coolant level and bad coolant sensor common problem within the VIC connections...

quick search turned up this:
http://www.jeepforum.com/forum/showt...lant+level+VIC
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Unread 05-07-2013, 01:33 PM   #8
treii28
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2002 WJ 
 
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Location: Ypsilanti, MI
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Quote:
Originally Posted by SDT03GCOverland View Post
I'm sure it's a no-brainer... I'm getting the annoying "Low Coolant Level" warning deal in my 03 Grand Overland. The level is CLEARLY not low. Sensor issue, right?

Anybody else experience and fix this?
Rockauto has them for $13 plus shipping

Cooland level sensor
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Unread 11-13-2013, 03:00 PM   #9
sadegur
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I have a 2000 jeep grand Cherokee 4.7 ltr. I am getting a "low coolant level". All fluid levels are fine. I have replaced the sensor/float in the coolant reservoir with a new unit. Still same problem. Once the engine warms up, I get the same warning. Any suggestions?
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