Question about 1996 Jeep Grand Cherokee

2 Answers

My indicator stated that I had a "bad coolant sensor." The warning would come on then go off every other day. Well this afternoon, after driving around all day, my 1996 Jeep Grand Cherokee started to overheat. The overfill was boiling, but my temperature gauge said the temp was normal. The overfill was leaking fluid from filling up so much.

Posted by on

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Jeep Master
  • 6,982 Answers

What repair did you make when the "bad coolant sensor" light came on? If you did nothing, I'm sure you know that not only does the sensor give you temperature info, it also tells the computer when the engine is warmed up so it can properly manage fuel delivery. That same information tells the computer when to turn any auxiliary electric fans on, or to modify the engine timing to cool down the engine.
At this point your only best option is to replace the sensor, the thermostat and re-fill with the proper mix of coolant. Check everything over for leaks and hope you have not sustained any major internal engine damage (head gaskets or cracked heads).
Good luck!!

Posted on Jun 06, 2010

Testimonial: "Thank you for your advice Thunder God. I will commit it to memory and apply it to my "

Ad
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Governor:

    An expert whose answer got voted for 20 times.

  • Expert
  • 105 Answers

I beg to differ. Your VIC (Vehicle Information Center), will display "Bad Coolant Sensor" for two reasons. The first is naturally that you have a bad coolant sensor. The other is for the "Coolant Level Switch" in your overflow tank. I would NOT buy a Coolant Temperature Sensor for the VIC in these Grand Cherokee Years similar to yours, will do that on occasion. Since the VIC is listed at the Dealership as "NS1", which means no longer available through Chrysler and it's not repairable, your message as to "Bad Coolant Sensor" will continue to appear with NO Further Problems whatsoever.

Now, IF it were the Coolant Sensor, this would cause the Check Engine Light to illuminate for the PCM or what you would call the Computer, would "read" the Coolant Temperature Sensor as being out of it's 0 to 5 volt range and then turn on the Check Engine Light which will stay illuminated until turned off by an appropriate scanner. The Dealership employs a DRB III to do this. So in essence, you have NO Problem with your vehicle and I've replaced VIC's and it will still occur with even a new VIC.

My recommendation? Leave everything as is, for yes, the VIC will tell you that the Coolant Sensor's bad, but the Computer still has it within it's normal parameters or operating range. By the Way, I own a 1997 and mine does the same thing...turns on for no reason and then turns off for no reason. Don't waste your money on a rep[air that's unnecessary when it could just be the "Coolant Level Sensor" in your Coolant Recovery Jug. I've replaced mine to no avail as well and still with everything within my Cooling system being brand new, I can live with the "idiot message" coming up every once in a while. Remember! If the Check Engine Light is On...then you have reason for concern.

~Buck Lewis~ or "00 Buck"

"Still living on the Right Side of Dirt, but on the Left Side of the Dirt Nap..." (smile)

Posted on Jun 09, 2010

  • Mark Lewis
    Mark Lewis Jun 09, 2010

    Addendum: It appears that your thermostat has gone bad insofar as your coolant recovery jug overflowing, so just put a Thermostat and Gasket in it.



    Trick of the Trade: when draining a cooling system, leave the Radiator Cap ON, open the Radiator's Petcock and the coolant will drain out of the Coolant Recovery Jug first, so you won't have to remove the 3 10 mm bolts and wash it out manually. Once it's empty, then remove the Radiator Cap and drain the rest of the fluid into a suitable container. Note: there is a Cylinder Block Plug near the Driver's side Motor Mount under the Intake and Exhaust Manifold, but a special tool is necessary to remove it and isn't really necessary. Should you need the formula for the water to anti-freeze mix, write me back for 50/50 is recommended, however 70/30 is too much. I have mine at 60/40 and including your coolant recovery bottle, your system should take 11 to 12 quarts dependent on the Engine.



    Good Luck,



    ~Buck~

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get to try the service completely Free afterwhich it costs $6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Coolant level sensor


this is a common problem and there is a factory service bulletin about it, just replace the sensor, it is located in the plastic side tank of the radiator and held in by a spring clip.

May 12, 2010 | 2000 Buick LeSabre

1 Answer

Just purchases my 2005 Impala. It should get a combined 26 mpg, but I am getting about 13 mpg. Its the base model 3.4 v6. Doing mostly city driving with occasional highway


Combined fuel ecomony is based on 50/50 driving between city and highway. But I agree that 13 mpg is quite a bit down from that!

Do you have a "check engine" light staying on while you drive?
I am guessing you don't or you would have mentioned it.

Bad fuel economy with no warning indicator can be a sign of problems with low fuel pressure or a non-functioning coolant temp sensor.

The coolant sensor can be reading in the cold range and keeping the car in a "cold/starting" condition that won't allow for the car to adjust to being warmed up.

I would have the car checked for any error codes by a local shop or parts store that offer cheap or free scans. At least to rule out the coolant sensor or fuel pump. The fuel pump will eventually go completely out if it is going bad so better to know now than later! Fuel pumps are expensive to replace and you will want time to save up for the job!

Good luck and be careful.

Dec 21, 2009 | 2005 Chevrolet Impala

1 Answer

1st start of the day. revs up then stalls.


check for coolant in the oil, or oil in the coolant.
smoke is comming from somewhere, most likely burning coolant from blown head gasket. or rings are smoked and burning oil :( gunk on egr is probably burnt coolant. sorry for the bad news :(

Aug 29, 2009 | 1993 Saturn SL1

2 Answers

Coolant level and blue temp light


Manual states that when the fluid is cold it will show up blue then as it wanrms up it goes away. a normal function. It's in the owner manual somewhere.

Aug 10, 2009 | 2000 Volkswagen Beetle

2 Answers

Coolant level sensor bad warning comes on console


Coolant sensor wiring would be the next place to look. Make sure connector is good, and look for broken wires.

May 31, 2009 | 1997 Jeep Grand Cherokee

1 Answer

"coolant sensor bad" warning comes on all the time.


change the coolant sensor, not the one for the level indicater,should be on the engine or in the radiator

May 10, 2009 | 1996 Jeep Grand Cherokee

3 Answers

I have a 1998 chevy caviliar and this light keeps coming. it has a arrow with water underneith what is that


1 IT IS OVER HEATING 2. THE RESERVE IS LOW NO COOLANT OR A DEFECTIVE SENSOR I THE RESERVE TANK

Dec 04, 2008 | 1998 Chevrolet Cavalier

1 Answer

1995 Oldsmobile Achieva


Sounds like the heater core is leaking, at least the smell, the other is either the cooling system has air trapped in it from a head gasket leak, or the sensor that turns on the light is defective, is the coolant clean? It will be one of 3 colors, red, green or yellow, rusty looking is very bad.

Oct 22, 2008 | 1996 Oldsmobile Achieva

Not finding what you are looking for?
1996 Jeep Grand Cherokee Logo

519 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

76630 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...