Home >> Volkswagen >> 2014 >> Beetle Base, 2D Convertible, 1.8L Eng VIN 1 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> 1.8L - Generic Scan Tool - Engine Code: CPRA (Convertible) [Engine DTC Tables] >> St Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> Three Way Catalytic Converter, TWC Checking