I have a heating problem with my saturn 1995 and i already change the heating sensor

No, it's advisable to disconnect the negative battery cable. Why do you wish to experiment?

On my daughters sl2 it is on the driver side. A note though, there are 2. Crazy i know, one above the other. One goes to the guage and one to the computer. When my son had the car it would not stay running at idol, had to rev the engine to keep it going. The engine would shake hard too, what through me was the guage in the care read fine but once i found the sensors the one looked fine the other looked like it split in half. Hope that helps

the thermostat is never the culprit, if it is bad the engine will tell you, not the heater. the heater core needs to be replaced. get a book or CD to show you how. good luck.

Located below the A/C compressor, it has the lower radiator hose attached to it and is held on by (2) 10mm bolts. You can change it with the A/C compressor installed, but will find it easier with the A/C compressor loose and out of the way.
thanks hope i been some help

the rear or #2 heated o2 sensor is under the car right after the cat converter,,,,about under the radio area,but under the car,,,,,youll see it

curious to know if you got this solved. Guessing downstream o2 sensor. did your vue idle high? act like it was getting too much gas? Let me know please.

Installation Removal & Installation

1. Remove the heat shield.
   
2. Note the routing of the Heated Oxygen Sensor (HO2S) electrical harness.
   
3. Disconnect the HO2S electrical connector.
   
4. Using a suitable Oxygen sensor socket remove the sensor.
   

To install:

NOTE A special anti-seize compound is used on the HO2S threads. The compound consists of a liquid graphite and glass beads. The graphite will burn away but the glass beads will remain, making the sensor easier to remove. New or service sensors already have the compound applied to the threads. If the sensor is removed and is to be reinstalled, the threads must be coated with an anti-seize compound before reinstallation.

1. If reinstalling the old HO2S, coat the threads with anti-seize compound.
   
2. Carefully install the HO2S to the pipe. Tighten the sensor to 22 ft. lbs. (30 Nm) on the sensor located at exhaust manifold, or 30 ft. lbs. (41 Nm) for the rear oxygen sensor.
   
3. Attach the sensor electrical connections.
   

Unplug the map sensor plug the lines and see if it still happens just stick a screw or something in them itll block out itll idle a bit different but if it doesnt solve its the issue also if you notice its only doin it when you hit your break it may be the break booster

Blair, I would take a look at he TPS (throttle position sensor) located on the throttle body. In other words, it sounds as thought sensor when heated is changing its value to "open" or "shorted".
If the car starts OK when cold, use a hair dryer to heat the TPS when the engine is cold to see if you can duplicate the problem.
Also is the a service engine light on? Codes?
If you have a "digital volt/ohm meter" available you can read the variable resistance of the sensor when the problem occurrs to determine if the sensor is defective.

The coolant temp sensor probably cracked and reading wrong. On drivers side of head. The lower one, with 2 wires going to it.