Coolant temp sensor

[350 ONE TON]

My coolant temp sensor is bad. I wa told there is 2 on these trucks, one for the gauge one for the ECM. The one that went bad on mine is the one for the ECM. So my question is, where is this sensor located?


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[kaya@bernhausen]

get the truck warm. whichever one of the 2 that you disconnect and results in a change to the gauge reading is the sender. there's one by the t stat housing, and one by the water pump

[350 ONE TON]

👍 Duh don't know why I didn't think of that. Thank you sir!


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[NoRalPh]

How do you know the sensor to the PCM is bad? I ask because if you're going by scanner readings, you might find a new one will not change anything as the ECT readings may not be accurately reflected in a scanner like the AE...

[timmyboy76]

Originally Posted by 350 ONE TON

My coolant temp sensor is bad. I wa told there is 2 on these trucks, one for the gauge one for the ECM. The one that went bad on mine is the one for the ECM. So my question is, where is this sensor located?


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being a 6spd, then yes, you'll see ECT on an AE, auto trans gets differed to EOT.

I'd like to see the "other" sensor. Only one i'm aware of is to the "rt" of t-stat.

But your correct, there is only 1 correct part #. Give me a few, to find the oem bag...posted on other site...

***for me, it was the 10884-AA p/n. Went to the first dealership only for them to have the same temp sensor for both location, the grey tab 12a648-AA, which had a plunger-like sensor feeler. The 10884-AA had the cone shape sensor feeler. Went to another dealership, same thing, until he went to the water-pump section, and noticed a "label" saying WATER TEMP, which also said, "black" connection. Went ahead hoping, and pulled trigger for 12 buks. part showed up 2-hrs later, installed over at buddys' place, and the trip home, dummy temp gauge, holding perfect. Before, darn needle would fluctuate from dead C to a tad above the first line.... ***

[350 ONE TON]

My scanner is showing -40. It's an OTC scanner. Does everything or more that an AE does. So that I correct that there is 2 different sensor then?


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[NoRalPh]

Originally Posted by timmyboy76

being a 6spd, then yes, you'll see ECT on an AE, auto trans gets differed to EOT.

That's Very interesting. You're saying the 6sps use the ECT, as the PCMs reference for things like the GP system, instead of the EOT as the Autos do?

I did not know that!

Originally Posted by 350 ONE TON

It's an OTC scanner. Does everything or more that an AE does.

Really? There's something else I didn't know You have an OTC scanner that does things like program the PATs, change tire size in the PCM, that kind of stuff???

[350 ONE TON]

Originally Posted by NoRalPh

That's Very interesting. You're saying the 6sps use the ECT, as the PCMs reference for things like the GP system, instead of the EOT as the Autos do?

I did not know that!




Really? There's something else I didn't know You have an OTC scanner that does things like program the PATs, change tire size in the PCM, that kind of stuff???

I didn't know that about the autos either. And as far as the AE vs mine, I was more referring to engine readings. No mine can not do tire size but it will do things with PATS. Not knocking AE it's a great tool but engine reading wise not sure it's any different


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[NoRalPh]

I really don't know much about OTC scanners, they make Excellent tools though (I have lots of their Ft End hand tools)

Here's what I have from the AutoEnginuity Forums (when they existed)

I wrote to AE support about this issue. They confirmed that the pinout is there and AE sees it but the 7.3 application does not use this pinout so it floats - the result is
that we see bogus information. Just ignore it, it's a result of Ford using the same hardware for multiple applications.

[timmyboy76]

my statement was purdy much, lack of better terms...i bet you see 320* with AE, correct?

Strange Coolant Temp reading with AE - Diesel Forum - TheDieselStop.com