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Because the gauge is broken.

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Q: Why is a BMW 3I8i E46 temp gauge stays on the red mark when you start the engine after overheating and had left it for more than a day?
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What is the solution for a 2004 Chevy Impala temperature gauge that stays on 260 degrees and car is not overheating?

get a new temperature sensor.


What can a broken thermostat in a vehicle do?

In very short: If the thermostat stays open, the warm-up time for the engine will be significantly longer, resulting in unwanted start-up wear. If the thermostat stays closed, the engine coolant can not circulate through the engine and cooling system, resulting in the engine overheating, as the coolant is used to keep the engine in a specific operating temperature.


Your temp gauge stays in hot Flushed radiator changed heat sensor and replaced thermostat to no avail?

Test gauge function with a mechanical gauge to get actual engine temp.


Why is the gauge stays on cold and does not move up even the engine has sufficiently warmed up?

The temp sending unit or gauge is bad, probably the sending unit.


Why Engine temp gauge stays on cold in your subaru impreza?

Your car engine isn't getting up to the desired temperature, about 130 degrees Fahrenheit.


Your oil gauge in your 91 cavalier stays up at max when the engine is running When you stop the gauge bounces back and forth until you start to move then it goes back to the max What is the problem?

probly bad gauge or loose wire buy a manual gauge one with the oil line right to the gauge nothing is wrong. the guage is supposed to be high when driving. it will drop when you stop or are idling.


Why does the heater blow cold and temperature gauge stays on cold on a 1994 Chrysler LeBaron?

Most likely cause is a failed engine thermostat.


When you tell your Xbox 360 elite is overheating?

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Temperature gauge stays on cold?

With no make/model/year/engine information to work with...The temperature gauge is driven by a simple sensor that is both cheap and easy to replace.Any auto parts store will be able to help you find it on your engine, and of course more than happy to sell you one.


Why your temperature gauge stays on hot?

Thermostat is sticking.


89 camaro rs v8 305 temp gauge stays above temp range no matter if car is warm cold off or on is it a problem with the gauge or the thermostat?

The needle is getting stuck at the top of the gauge. Take face plate off and bend the edge of gauge down so not to get stuck up There again! If the gauge is not moving then I would suspect that. If your car starts and runs and the engine gets warm and the radiator gets warm and you can get heat out of your heater then yoru thermostat is okay. Make sure your temp sending unit, which should be out near the thermostat housing, is connected. If you find it, pull off the connection and make sure the connection is clean. If you start the car and only the motor gets hot, do not overheat the engine. If the engine gets above operating temp and the radiator stays cold, then it may be the thermostat or a broken water pump.


What turns on the check engine light?

The engine computer turns it on at start up for a bulb check. If it stays on the computer has detected a malfunction and set a code.