Re: "Coolant Sensor Bad"
googlegroups@gersic.com proclaimed:
>>IS there a layer of brownish red scum (or any other color) in the expansion >>tank? > > > No, but there was back when I bought the car. I flushed the coolant > using one of those garden-hose adapter things, and cleaned the overflow > tank about two years ago. I wouldn't eat off of it or anything now, but > it's reasonably clean. > Connectors on the wiring to that sensor all crudded up? |
Re: "Coolant Sensor Bad"
googlegroups@gersic.com proclaimed:
>>IS there a layer of brownish red scum (or any other color) in the expansion >>tank? > > > No, but there was back when I bought the car. I flushed the coolant > using one of those garden-hose adapter things, and cleaned the overflow > tank about two years ago. I wouldn't eat off of it or anything now, but > it's reasonably clean. > Connectors on the wiring to that sensor all crudded up? |
Re: "Coolant Sensor Bad"
googlegroups@gersic.com proclaimed:
>>IS there a layer of brownish red scum (or any other color) in the expansion >>tank? > > > No, but there was back when I bought the car. I flushed the coolant > using one of those garden-hose adapter things, and cleaned the overflow > tank about two years ago. I wouldn't eat off of it or anything now, but > it's reasonably clean. > Connectors on the wiring to that sensor all crudded up? |
Re: "Coolant Sensor Bad"
The girl that owned the WJ before me allowed her quickie-lube to add
Prestone Universal (DexCool) to the system. It turned the coolant into brownish red sludge The sensor is pretty much a float but the float gets stuck when it is full of sludge. "Lon" <lon.stowell@comcast.net> wrote in message news:WdOdndOAabAX2WHZnZ2dnUVZ_qidnZ2d@comcast.com. .. > googlegroups@gersic.com proclaimed: > >>>IS there a layer of brownish red scum (or any other color) in the >>>expansion >>>tank? >> >> >> No, but there was back when I bought the car. I flushed the coolant >> using one of those garden-hose adapter things, and cleaned the overflow >> tank about two years ago. I wouldn't eat off of it or anything now, but >> it's reasonably clean. >> > > Connectors on the wiring to that sensor all crudded up? |
Re: "Coolant Sensor Bad"
The girl that owned the WJ before me allowed her quickie-lube to add
Prestone Universal (DexCool) to the system. It turned the coolant into brownish red sludge The sensor is pretty much a float but the float gets stuck when it is full of sludge. "Lon" <lon.stowell@comcast.net> wrote in message news:WdOdndOAabAX2WHZnZ2dnUVZ_qidnZ2d@comcast.com. .. > googlegroups@gersic.com proclaimed: > >>>IS there a layer of brownish red scum (or any other color) in the >>>expansion >>>tank? >> >> >> No, but there was back when I bought the car. I flushed the coolant >> using one of those garden-hose adapter things, and cleaned the overflow >> tank about two years ago. I wouldn't eat off of it or anything now, but >> it's reasonably clean. >> > > Connectors on the wiring to that sensor all crudded up? |
Re: "Coolant Sensor Bad"
The girl that owned the WJ before me allowed her quickie-lube to add
Prestone Universal (DexCool) to the system. It turned the coolant into brownish red sludge The sensor is pretty much a float but the float gets stuck when it is full of sludge. "Lon" <lon.stowell@comcast.net> wrote in message news:WdOdndOAabAX2WHZnZ2dnUVZ_qidnZ2d@comcast.com. .. > googlegroups@gersic.com proclaimed: > >>>IS there a layer of brownish red scum (or any other color) in the >>>expansion >>>tank? >> >> >> No, but there was back when I bought the car. I flushed the coolant >> using one of those garden-hose adapter things, and cleaned the overflow >> tank about two years ago. I wouldn't eat off of it or anything now, but >> it's reasonably clean. >> > > Connectors on the wiring to that sensor all crudded up? |
Re: "Coolant Sensor Bad"
I would start by cleaning the plug and socket on it with a good spray
contact cleaner. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) googlegroups@gersic.com wrote: > > Hi All, > > I have a 1997 Jeep Grand Cherokee Laredo 4x4. For the last year or so, > every so often (a few times a week), I get the message "Coolant Sensor > Bad" in the center console (the area that shows "miles to service" and > when doors are open and such). According to various sources, the > coolant sensor in question is the coolant level sensor in the overflow > tank. The other coolant sensor that is in the engine block throws a > "check engine light" error code if it's having problems (I've verified > that by unplugging it), so I'm reasonably certain that that's not the > one causing the problem. > > Now, I'm sure most of you are thinking, "why don't you just replace the > coolant level sensor?" I did that right away last year when it first > started happening. It didn't have any affect on the problem whatsoever. > I've also brought the car to the Jeep dealer, and surprise, surprise, > it didn't happen while the car was there, so I got to pay the > diagnostic fee and go home. > > One interesting thing is that the "coolant sensor bad" message didn't > occur all winter, so it does appear to be affected--at least to some > degree--by temperature. > > Anybody have any ideas on how either to fix the problem with the > coolant sensor, or to at least get it to stop telling me about it? I > don't particularly care if there's a problem with the coolant level > sensor...I'm perfectly capable of lifting the hood to look at the > overflow tank, but the beeping from the console is kind of annoying. > > Thanks, > Tom |
Re: "Coolant Sensor Bad"
I would start by cleaning the plug and socket on it with a good spray
contact cleaner. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) googlegroups@gersic.com wrote: > > Hi All, > > I have a 1997 Jeep Grand Cherokee Laredo 4x4. For the last year or so, > every so often (a few times a week), I get the message "Coolant Sensor > Bad" in the center console (the area that shows "miles to service" and > when doors are open and such). According to various sources, the > coolant sensor in question is the coolant level sensor in the overflow > tank. The other coolant sensor that is in the engine block throws a > "check engine light" error code if it's having problems (I've verified > that by unplugging it), so I'm reasonably certain that that's not the > one causing the problem. > > Now, I'm sure most of you are thinking, "why don't you just replace the > coolant level sensor?" I did that right away last year when it first > started happening. It didn't have any affect on the problem whatsoever. > I've also brought the car to the Jeep dealer, and surprise, surprise, > it didn't happen while the car was there, so I got to pay the > diagnostic fee and go home. > > One interesting thing is that the "coolant sensor bad" message didn't > occur all winter, so it does appear to be affected--at least to some > degree--by temperature. > > Anybody have any ideas on how either to fix the problem with the > coolant sensor, or to at least get it to stop telling me about it? I > don't particularly care if there's a problem with the coolant level > sensor...I'm perfectly capable of lifting the hood to look at the > overflow tank, but the beeping from the console is kind of annoying. > > Thanks, > Tom |
Re: "Coolant Sensor Bad"
I would start by cleaning the plug and socket on it with a good spray
contact cleaner. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) googlegroups@gersic.com wrote: > > Hi All, > > I have a 1997 Jeep Grand Cherokee Laredo 4x4. For the last year or so, > every so often (a few times a week), I get the message "Coolant Sensor > Bad" in the center console (the area that shows "miles to service" and > when doors are open and such). According to various sources, the > coolant sensor in question is the coolant level sensor in the overflow > tank. The other coolant sensor that is in the engine block throws a > "check engine light" error code if it's having problems (I've verified > that by unplugging it), so I'm reasonably certain that that's not the > one causing the problem. > > Now, I'm sure most of you are thinking, "why don't you just replace the > coolant level sensor?" I did that right away last year when it first > started happening. It didn't have any affect on the problem whatsoever. > I've also brought the car to the Jeep dealer, and surprise, surprise, > it didn't happen while the car was there, so I got to pay the > diagnostic fee and go home. > > One interesting thing is that the "coolant sensor bad" message didn't > occur all winter, so it does appear to be affected--at least to some > degree--by temperature. > > Anybody have any ideas on how either to fix the problem with the > coolant sensor, or to at least get it to stop telling me about it? I > don't particularly care if there's a problem with the coolant level > sensor...I'm perfectly capable of lifting the hood to look at the > overflow tank, but the beeping from the console is kind of annoying. > > Thanks, > Tom |
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