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Mechanics computer shows car motor temp at199 degrees but sensor reads in read? Must we buy a ford brand temp senor?? Any advice would be appreciated. Drove 399 miles and no overheating. watching to see if antifreeze is bubbling. No. Pls. help. Tks. gfr3d3r1ck@hotmail.com

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More than likely the temperature sensor is sending the wrong signal. You are on the right track, replace it and insure there are no issues with the wiring or connector to this sensor.

This should solve the issue.

Posted on Oct 05, 2010

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Posted on Jan 02, 2017

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Why does the temperature gauge on my 1995 Chevy K2500, 5.7L read 150 degrees ?


If you replaced the SENSOR and not the gauge SENDER, there's your answer.

The SENSOR sends the computer (ECM, PCM, ECU, etc.) the engine temp so it can make the adjustments to the fuel, timing etc.

The gauge SENDER makes the gauge read what temperature the engine coolant is.

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I replaced my temp sensoe and it reads ccd


Hi Glenn, I'm glad to help! Here's how you check the Ambient Temp Sensor circuit itself to see if its working properly. Disconnect the Ambient Temp Sensor Connector. If the temp reading go to the default mode it will show 40 degrees. If it doesn't go to 40 Degrees then thyere something wrong with the system. Could be wiring or display itself. If it does go to 40 degrees then I'd try another sensor and see what happens. Hope this helps and have an awesome day Glenn.

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re-flashing a computer is done if Chrysler found problems in vehicles and would download the new info to the computer to correct them,

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This probably occurs when you start up after the engine has been off for a few hours. What is happening is that the module is taking a new temp reading however heat from the radiator is causing the sensor to read a warmer value than it really is. I suggest that you relocate the temp sensor further away from the radiator and closer to the grill opening in order to read actual ambient temp (approx 6" should work).

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