Low RPM at a stop

Hello all im new to the forum here. My wife acquired a 2007 mazda cx7 from a relative. The car is at 75k and i have already had to deal with the nasty timing chain issue. Something else has popped up here. I am getting a p0455 code. several weeks ago i replaced the gas cap with a locking one. When the code popped up i immediately swapped out the after market cap for the OEM one and cleared the code. It has been about 5 days and the engine light hasnt returned but Now the car is idling low at around 500 rpm and attempting to stall while sitting at a stop in the Drive gear. Any idea if this is related to the EVAP code?

IMHO check throttle body first.

thanks, I did pull the hose and clean the TB. it is all good as of now