What does check emission system mean on acura mdx?

The check emission system on an Acura MDX means it has detected a malfunction in the vehicle's emissions, ignition, fuel, or exhauSTSystems. It typically means the car's emissions control system is faulty, and the vehicle is polluting the air beyond allowable federal standards. A vehicle in this condition would fail an emissions inspection or smog check. The fuel evaporative system (EVAP) controls emissions by housing vapors from evaporated fuel and sending them back to the fuel tank to be reused. The cost for EVAP system repair ranges between $200 and $560. The labor alone will coSTSomewhere between $35 and $140, while parts will run somewhere between $150 and $440.