Quote:
Originally Posted by GH85Carrera
WOW! Golly modern cars are great. 
That is astonishing. All that to clear a code about air conditioning. I guess in many parts of Arizona, AC is vital. I had no idea the AC system was monitored like that on modern cars. |
Evap codes are not air conditioning even though it sounds like it from terminology.
It's a system that has been on all cars for decades but given what you fiddle with Glen, you probably don't see this stuff since they are post 1994-ish with OBD2.
Evap means evaporative emissions. When you or others fill a car or lawnmower gas tank you have seen the vapor coming out around the filler neck. That's evaporative emissions.
The EPA requires a car to self test it's ability to not leak gas tank vapors. I'm not sure when testing if it pulls a vacuum or pressurizes the vapor venting and recovery system but the car has to hold the pressure or the vacuum for a certain length of time or it throws a code. If it leaks fast it throws one code. If it leaks slow it throws another.
Often it's the just gas cap seal.
That said, OP's car won't run the self test in timely manner. Driving cycle may hasten the self test.