About 2 days ago, I decided to go to the honda dealership, and buy a new radiator for my EF. I have a LS motor, gsr tranny and ll that happy stuff. Just to let you guys know, the car was running with no problems at all before I did the radiator swap. After installing and refilling all the fluids, I turn the car on, and let it warm up and observe.
The car didn't even heat up like normal(well it was heating up, but the thermostat wasn't reading so). So I check the radiator again and it seems fine. So I take it for a ride for about 10 minutes or so. The car felt like it was sputtering, like if it had no gas, but it had enough for it not to act wierd(about a little under half a tank).
Then the check engine light goes off, and I check the ecu, it throws a 43, and the car has yet to read at running tempature. do you guys think it has something to do with the thermostat? and why would 43 pop up, if it has to do with the fuel system, give me an input please.

 

My car reads 43 and 3 and I havn't figured it out yet. Mine doesn't do the thermostat thing though.