Why does my temperature gauge stay on hot

Sometimes when it does it my truck sputt. Bypass Temperature Sensor - Connect a jumper wire between the 2 pins of temperature sensor harness connector.

If the temperature gauge reads high it could mean your engine is overheating.

Why does my temperature gauge stay on hot. Jul 27 2011. My vehicle had 2 separate Coolant Temperature Sensors. One for the gauge and one for the PCM kinda odd that.

The one for the gauge went bad and randomly quickly spiked to HOT or COLD then randomly worked. It was really weird I suspect a broken wire or element. A car temperature gauge shows how hot the engine is.

If the temperature gauge reads high your car could be leaking coolant or have a bad water pump. When there is a second sensor for the dash gauge it will have just one wire. Unplug that one-wire sensor then see what the gauge does.

If it stays on hot turn the ignition switch off then measure the resistance on that wire to a paint-free point on the engine block. If you find low resistance probably in the area of 100 ohms or less. The needle about midrange.

Put it in parallel with the the sensor when at operating temp you would see a very hot reading on the gauge. Rtotal 11R1 1R2. It looks like you have a wiring fault.

Theres another connector between the instrument panel and the sensor FSM shows its located behind and below the radio. Temp sender unit is faulty. Remove the sender unit wire and earth it against the bodywork and the gauge should go straight up to hot.

This indicates that the gauge and wiring is. The temperature gauge can show hot without the engine overheating which still means that is a problem. It should not be above 210 degrees.

Disconnect coolant temperature sensor. If temperature gauge indicates cold go to next step. If temperature gauge does not indicate cold go to step 3.

Bypass Temperature Sensor - Connect a jumper wire between the 2 pins of temperature sensor harness connector. If temperature gauge indicates hot replace coolant temperature sensor. In a drive belt-driven fan the clutch can go bad or the belt can break which will result in the fan not running.

To check this drive the car until it is warm and then idle a few minutes keeping an eye on the temperature gauge to make sure it doesnt get too hot. One or both of the fans on the radiator should be spinning at this point. BlueDevil Proon February 19 2021 at 859 am.

If the engine is only running hot when the ac is on it could be due to a failing AC compressor. Because you didnt mention having an issue with the AC the problem is more than likely related to a flow issue in the cooling system. When im cruising around town or at highway speeds basically over 45 mph my temp gauge jumps all over the place from way hot to extremely cold back and forth.

Yet when im sitting still at a red light it reads normal right in the middle and stays put. Doesnt do it until it gets up to normal operating temp. Sometimes when it does it my truck sputt.

If the sensor reads 30-50 Ohms when the engine is hot then there may be a problem with the wiring back to the gauge or with the gauge itself. Make sure the engine is turned OFF and that the vehicles ignition key is in your pocket when you test the sensor. Also dont burn yourself on the engine block when the engine is hot.

If the temperature gauge reads high it could mean your engine is overheating. Another reason your reading might be high is you could be losing coolant. A small leak or evaporation may cause your radiator to slowly lose coolant.

A third reason your temperature gauge reads high could be because the thermostat is broken. My thoughts are of course electrical. The temp gauge cant fluctuate that drastically without it being some sort of circuitrelaysensor issue.

I think something is throwing a bad voltage confusing the car and it is dropping the ac. Just like it does when the car gets too hot except this isnt a too hot issue. Reasons why the temperature gauge reads high If your temperature needle goes up and reaches the red zone it could be an indication that your engine is overheating.

Another possible reason is that you might be running out of coolant due to a leak or evaporation. Your Accord is equipped with a temperature gauge that shows you how hot or cold the engine coolant is. During normal operation it should stay in the middle of the range.

If it moves into the red though you need to do something immediatelyhttpsforpc. Camjiofilocalhtml If theres no steam visible watch the temperature gauge. Test the gauge by temporarily unplugging the coolant temperature sender gauge should go all the way hot or cold then ground the sender signal wire and gauge should go all the way the opposite direction.

The temperature gauge can read incoherently if the coolant temperature sensor CTS is bad. There are other things that can cause the temperature gauge to malfunction and could be the reason for the issues youre facing. The main reason why car temperature gauge goes up and down while driving is because something is not working.