Po2136 po0496

Question

Wondering what the experiences with the 2136 code and the 0496 codes together which is the throttle position sensor and evap emission system high purge flow running together is it usually a loose ground somewhere or do the sensors need to be replaced and where are the sensors located history on the car, it has hit a cow recently on driver front corner didn't hurt the caddy at all other than some cosmetics and it does have a small radiator leak somewhere I believe