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.
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"
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...
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?
Bogus Coolant- Level- Low message-2000 Jeep Gr Cherokee
I also have a 2000 Jeep Grand Cherokee with the same problem, although intermittent. The chime sounds and sometimes I get a very brief Coolant low message in the VIC, almost too brief to be sure that's what it says :-) I'm going to replace the sensor as the condition message is triggered by that sensor and I don't see any wiring or connection problems.