OBD trouble codes related to EVAP system include p0443-0457/p0465-0469. If sucn trouble codes are detected, EVAP system should be tested. EVAP, E-G-R Test. Inject 10ml-20ml of test oil into the smoke leak detector, filling 20ML of test fluid, under standard working conditions, can be used continuously for about 10 minutes; (about Smoke Oil: advise use the Baby oil).