P0115 engine code

From others that read my previous thread I had the ecm replaced since it was damage and install everything and it’s all good but it’s pulling a p0115 my ultra gauge is saying it goes from -40 to 160ish but my dummy gauge on dash is working. Could this be the ecm?

 

Manual says an open circuit will indicate -40 degree.
It sounds like you may have a bad connection somewhere?

 

Not sure where is the sensor located?

 

Water temp sender sensor is for combo meter. It will work even when the ecu doesnt see temp.
Engine coolant temp sensor is for ECU. Check the sensor to make sure its getting 5v reference on the black/red wire and then check its resistance inside the sensor itself.

 

Is ther a image where it’s at?

 

Its near the firewall under the heater hoses, back of the head I believe. No photo. A service manual would help you out. It's page SF-49 if you can find that.

 

Yea I don’t have one so I’m not sure I tried looking at one, but it wasn’t loading for me

 

The one for the gauge will have a single wire, the one for the ECM will have 2 wires. I found this picture kinda shows the general area.

Open circuit coolant temp in scan data will read around -40F, if you short the wires together coolant temp should read around 284F if it doesn't you likely have an open in the wiring.

 

I’ll check at the sensor and go from there. Possibly i moved the harness and it messed with it...

 

Found the sensor and One of the wires is broken off clip.

 

That’s your problem.
The part # on the plug is just for the plug.
It won’t have any wires. You can either try to find a pre-made pigtail.
Buy one from a salvage years.
Or build your own.

If you build your own, you’ll need something like this.
With the terminal ends.

 

Here you go.

 

I was able to get one off another harness and it went on and code cleared truck ran good!

 

Only problem was I crimped one side a little less and the code popped up I looked and saw the wire lol. Gonna finish it tomorrow though

 

Yup always give it the "tug test" when doing any type of crimp connection, seen it many times. Soldering would be best but crimping is ok too, anything is better than the old "Twist & Tape" lol.

 

Lol yea not that