Home >> Volkswagen >> 2001 >> Jetta GL, 2.0 S, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 2.0L - Engine Mechanical - AEG, AVH, AZG, BBW, BEV (A4 Platform) >> 20 Fuel Supply >> Evaporative Emissions (EVAP) system >> Function of EVAP system >> Notes