S14 with s13 sr swap no coolant temp reading

[Magnoliarichj]

Ok before I start a little about me and my swap

I am a high line auto tech and have been for 11 yrs. I'm no stranger to cars wiring etc but I am humble enough to admit when I'm wrong and open to new ideas.

My swap is in my 1996 s14 I installed a 180sx black top sr20det engine
Wiring specialties harness, fmic, full exhaust, and it is running a power fc d jetro.

Car runs great idles great once warm rock solid at 800rpm I have the iacv capped so cold start is a little hard but not a big deal for me.

So there is no temp reading on the dash checked connection and its good. No temp reading for coolant on my pfc commander checked connection all is good

I go to sensor readings and the pfc shows that the wtrtemp sensor is 5v.
And highlighted. According to the manual this means that the sensor is bad and in need of replacement. So I did I replaced the sensor. Still no change

I have bleed the coolant system 2 times and checked that coolant is behind the sensor. I have check the wiring harness for a break and nothing.no
change any ideas guys?

Also my heck engine light is on solid.
And the temps read for about a day and now nothing so it was working but now does not I am stumped

I'm going to add an aftermarket temp gauge and was wondering if I can jus add the signal wire from the aftermarket gauge and wire it into the pfc ?

Thanks all for your help