Home >> Volkswagen >> 2002 >> GTI Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> 1.8L - On Board Diagnostic (OBD), Generic Scan Tool - AWD, AWP, AWW >> Generic Scan Tool >> Select diagnostic function >> Diagnostic mode 6: Check test results of components that are not continuously monitored >> Test-ID 05: Tank ventilation system >> Test requirements