Hey there everyone. I have just finished the 4.6 to 5.4 engine swap on my friends 2002 f150. Getting a code p1289 and no temperature indication on the gauges. The connector is different from any sensor that I have been able to find. My friend sold the original engine and I think the original cht sensor was left that engine. I got what was supposed to be the correct one from oreillys and installed it. I am guessing that it is not the correct sensor. Can anyone identify the picture of the original sensor connector? I have attached it. Maybe I am looking at the wrong connector but it is the only one left and it is the correct length to reach the sensor.

 

What year is the 5.4 engine and what is it out of?

 

The engine is from a 2000 Expedition. Full rebuild by a local machine shop. I am using all of the original harness from the 4.6. I would have used the original sensor but he sold the engine before I got everything removed.

 

Those 2 engines use the same sensor. However, if there's a connector issue, this should work:

https://www.rockauto.com/en/moreinfo...5377&jsn=10565

 

Thanks GLC, The connector has keys in different locations than the factory sensor images I have been able to locate. There is always the possibility that the new sensor that I installed is bad. I am not 100% that is the correct connector however. Do you know what the wire colors are for the cht on a 2002 4.6 ? I have not been able to find anything that matches the colors on this truck.

 

The item I linked comes with a connector and pigtails. All you have to do is cut and splice.

 

I picked up a new sensor and pigtail from the dealership. I will let you know how it goes.

 

Tip: When you cut and splice it, solder the wires and heat shrink it. Don't use butt/crimp connectors, etc.