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Home >> Volkswagen >> 2004 >> GTI Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> 2.8L - Fuel Injection Ignition [BDF] - [01-On Board Diagnostic] >> 01 On Board Diagnostic (OBD) >> Measured value (data) blocks >> Measured value blocks, display groups 30...33, 99 - Oxygen Sensor (O2S) control, evaluating >> Evaluating display group 46, display zone 4 - Three Way Catalytic Converter (TWC) diagnosis (conversion test)
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Evaluating display group 46, display zone 4 - Three Way Catalytic Converter (TWC) diagnosis (conversion test)

Appears on display Possible cause Corrective action
Three Way Catalytic Converter (TWC) not OK.: Cat B1 nOK.
  • DTC stored in DTC memory
 
  • Three Way Catalytic Converter (TWC) faulty
  • Perform road test at a constant speed
  • Perform diagnosis again if result is same:
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