I just swap a d16 in my car and before I did my temp sensor was fine in my car, but after the swap my sensor stays at cold and sometimes at a stop light the sensor will read normal somtimes. Could a bad thermostat be causing this?

I searched but all I got for a bad thermostat is that your temp sensor will read hot.

 

I got the same issues too, temp gauge would never reach half way and if I got the heat going it would drop a little, but I would still get heat though. Did it before the swap and and still the same afterwards. So I guess I'm looking for the same answer as you too.

 

Also if this helps too, my heater doesnt blow out hot air anymore.

 

Also it might be that your Thermostat is stuck open but if i was u i will just buy a new one there not that expensive