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7.3 Coolant Temp Shows Elevated W/Cold Eng

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Old Apr 7, 2017 | 05:18 PM
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7.3 Coolant Temp Shows Elevated W/Cold Eng

My 2000 F350 lately has been showing the coolant to be on the low end of normal on the gauge, even when it has been sitting out below freezing temps, shut down for days.

While warming up the temp will eventually start coming up. It's just that my starting point on the cold truck is already slightly warm.

I assumed I needed a new ECT sensor for my motor. Went to the dealer for it and they didn't know which sensor is for ECU and which is for the gauge. In a google search someone showed a pic of the sensor near the coolant intake being the one I should replace.

Am I on the right track for this problem?
Anyone know for sure if the one next to the coolant hose inlet is the gauge sender?
Anyone know the actual motorcraft part number for the sender?
Anything else I should be looking at?

Thanks,
John
 
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Old Apr 7, 2017 | 05:38 PM
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You should only have one coolant temp sensor on a 2000 MY truck, next to the thermostat housing.
 
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Old Apr 7, 2017 | 06:00 PM
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Is it a manual or an auto trans truck? I think the stick shifts had two coolant temp sensors, whereas the autos only had the one.....
 
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Old Apr 7, 2017 | 06:08 PM
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Thanks for looking guys!

I have the Auto Xmission.
 
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Old Apr 7, 2017 | 10:04 PM
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Originally Posted by JStauff
Thanks for looking guys!

I have the Auto Xmission.
If that's the case you just have the one for the dash, the PCM doesn't read the coolant temp, only EOT IIRC......
 
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Old Apr 9, 2017 | 01:09 AM
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Coolant temp sensor reasonably priced OEM quality at a site sponsor.
 
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Old Apr 9, 2017 | 10:45 AM
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Originally Posted by aawlberninf350
Coolant temp sensor reasonably priced OEM quality at a site sponsor.
Appreciate it! I had already ordered the SW5130 motorcraft sensor on Amazon. Shows to be the same.
 
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Old Apr 9, 2017 | 02:20 PM
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Unplug the sensor, if the dash gauge goes to cold then the sensor is probably bad. If not then the gauge in the cluster might be defective.
 
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Old Apr 10, 2017 | 12:42 PM
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Originally Posted by Hussler
Unplug the sensor, if the dash gauge goes to cold then the sensor is probably bad. If not then the gauge in the cluster might be defective.
Thanks Jim, I'll pull the wire this afternoon and check it out.
 
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Old Apr 22, 2017 | 11:12 PM
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Pulled the wire from the Coolant Sensor with a cold engine and the gauge dropped to the bottom.
Ordered a new Motorcraft sensor on Amazon and ALL is back to normal!
Thanks for the help!
 
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Old Apr 23, 2017 | 03:18 PM
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Originally Posted by JStauff
Pulled the wire from the Coolant Sensor with a cold engine and the gauge dropped to the bottom.
Ordered a new Motorcraft sensor on Amazon and ALL is back to normal!
Thanks for the help!
Good job, that sensor seldom fails. You are one of only a few on here that have reported that. Thanks for the feedback.

 
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