2000 Saab 9-3 Owner's Manual - Page 171
2000 Saab 9-3 Manual
Page 171 highlights
Car care NOTE The Trionic engine management system continuously monitors the operation of these systems and has on-board diagnostic capabilities (OBD II). If the CHECK ENGINE light in the main instrument illuminates, the Trionic ECM has detected a problem. The car will continue to operate, but performance may be diminished. You should have your car checked by a Saab dealer as soon as possible. 171 ORVR (Onboard Refueling Vapor Recovery) All hydrocarbons formed when refuelling will be recovered by the car and not released into the atmosphere. The hydrocarbons are absorbed in an evaporative emission canister. When the engine is subsequently started, the evaporative emission canister is gradually purged as air is sucked into it through a shut-off valve. The hydrocarbon/air mixture passes through the evap canister purge valve and into the engine where it is burned. "Refueling", see page 138.