Originally Posted by marek
There are problems with this test as the OBD can't perform an EVAP test when it is too cold outside (IAT reading to low to perform test). You will get a "not ready" and you can potentially fail, even on brand new cars.
is there a workaround?
I think if you put some heat on the LDP Vacuum solenoid or just warm up the car in general it should be good. The rubber diaphragm just needs to be warm enough to move properly so you dont get a code.