I am pulling a p0422,p0455, and p0116. Any ideas what to look for and how to fix these?

 

p0422- main catalyst efficiency below threshold
p0455- evaporation emission system leak detected (large leak)
p0116-Engine coolant temperature circuit range/performance

how to fix these...i have no idea! but hope that helps

 

Sounds like you need a Thermostat.