Temp gauge not working...is it the gauge or a sensor?

the temp gauge works of a different sender to the coolant sensor. IT has 1 wire only and changes resistance as the water heats up there by moving the needle on the gauge up the scale Check that the wire is tight on the sender unit and if so then replace the sender unit.. The difficulty in re starting the motor may be because it is over heating but you would not know this because of the faulty sender unit.

Locate the temp sensor in the coolant system and take a good look at it. Make sure it is firmly fixed in place and the wires to it are clean and not corroded. If its ok, check the connectors to the dash for damage.

If the heater is producing normal heat, then the problem is not the thermostat. The sensor for the temp gauge or the temp gauge itself is more likely the cause.

YOur guage is faulty. Your will need to replace your guage if it stays in the hot position even when your car is off and your key is out of the ignition. If it only rises to hot when you turn the key to the run position, you have a wire between your guage and your temp sending unit that has been gounded out. Usually this happens when a person opens their hood to add oil or perform some minor maintenance on the engine and inadvertantly bumps the sensor or switch or wiring. This causes about 65% of these minor issues people incur, but if it does stay all the way up with your key out of the ignition switch, then you will need to replace your temp guage.

Well, "Or What" would be the correct answer based on the choices given. Please read this article about fuses: Where's The Fuse?

You most likely have a problem with the Coolant Temperature Sensor. There are a couple of temp sensors. The one with the single green wire is the one for the gauge. If you disconnect the wire from the sensor, the gauge should read COLD. If you take a paper clip or small screwdriver and ground the green wire, the gauge should read HOT. If this works, then replace the sending unit. If the gauge stays COLD even when the wire is grounded, Then you need to check for an open circuit in the green wire between the sending unit (Sensor) and the insrument cluster. If the gauge reads HOT even with the sending unit unplugged, then check the green wire for a short to ground between the instrument cluster and the sending unit. If there is no problem with the wire - Not open or grounded, then the gauge itself is bad.

Its connected by 1 wire to the engine block, it looks like a bolt head with a spade connector coming out of it, probably copper or brass coloured, about a 12mm nut. There should be a wire going to it - if you short this wire to the car body/engine the temp will either bury itself at HOT or COLD depending on how the guage works - if you can make the needle move by shorting the temp lead on the engine then it's the temp sensor at fault and not the wiring, conversely if the temp gauge doesn't budge at all when you do this the gauge is faulty or the wire is broken somewhere.

You may have a relay, and thermostat and or computer issue. You need to get it diagnosed properly. Also make sure the wire did not fall of the Temp sensor.

There are two sensors, one for ECU temp. readings with two pin connector and other one with only one wire, which has been probably disconnected when you replaced the CPC solenoid - very close position.

Switch ig. on, ground the sender unit wire for about 3 seconds see if the temp. gauge moves, if so change sender unit, if not then it is a faulty gauge reader.

it is the other sensor
the two wire is for you engine control computer