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Q: its overheatng the second i start it when its been sitting for several days what can this be

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i can start my car and as soon as i do the temp goes as high as it possibly can when i havent been driving it and it has good clean coolent in it and i dont even think the engine is actually overheating

My car has 137000 miles.
My car has an automatic transmission.

Hello. If the temperature is rising right when you start it then it usually is not a overheating issue. Even with a bad overheating problem the engine usually takes a while to warm up. It sounds like you have a bad coolant temperature sensor, a wiring problem, or a gauge issue. Most of the time it is the sensor or the connection at the sensor that causes this. I typically fully test the sensor and the circuit first and if nothing is found I replace the instrument cluster. If you need this temperature reading problem fixed, consider YourMechanic, as a certified mechanic will come to your home or office to diagnose and repair this.

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