2002 Prius no dash reading for ambient air temp sensor, A/C problems

Let me start this off by saying that I'm an idiot and probably shouldn't be working on cars. I bought a used Gen I Prius about 6 months ago and while the interior was a little rough and dirty, it has run like a champ. It was a great purchase and has saved me a ton of money and (until now) worry about something going wrong on an expensive car. The dash panel was cracked, so thanks to a thread I found here, I decided to order a new one and replace it myself. It was so brittle, I was able to basically rip it out in chunks and deal with the hardware after. I should've spent more time reading about how to actually deconstruct it properly, but like I said I'm kind of an idiot.

Anyway, for whatever reason (read: my fault probably, almost certainly), the ribbon cable running from the HVAC controls to the circuit board behind it wasn't connected properly when I put everything back together, and something shorted, capacitors popped, things went wrong. It was like a Michael Bay version of Tron. The radio controls and HVAC controls stopped working, and I lost the ambient temp reading on the main display. It doesn't even say "- -" as some people have mentioned in other threads. It just says "Outside Temp" with no number or anything. I found a used main circuit board (the one with all the radio controls and HVAC controls) on ebay for fairly cheap and replaced it, ensuring to properly attach the ribbon cable this time.

When I fired it back up, everything worked! It was a miracle. Except for the A/C and the ambient temp reading on the display. The green LED on the A/C button lights up with no blinking, but I never hear the compressor kick in and it doesn't blow cold air. The first thing I did was replace the relay because that was cheap and easy, but that didn't solve anything. I did some digging, and the A/C fault code I get through the "press 3 times and turn to auto" method is 14. But I can't find out what 14 means. And through some more digging, I found out that the ambient temp reading plays an important role in the A/C function. So now I'm thinking, since the A/C light isn't blinking, that all my problems are tied to that little temp sensor. But I have no idea which part to look at or replace to fix it. I'm assuming the sensor itself is fine, but the controller, wherever that lies, isn't. Any ideas or suggestions would be really appreciated.

 

Thanks! The honeymoon period has definitely worn off by now. I paid the $15 entry fee and it's already helping. Apparently 14 is the engine coolant temp sensor. Both sensors have the ecu/harness in common, so I at least have a plan of attack.