Emission Control Systems: Technical Service Bulletins

• By Symptom
  • Instrument Cluster - Functions Erratically
• All Technical Service Bulletins
  • Emissions - Evaporative Emissions System Testing
  • Resistor - Controls Electronic Interference
  • Instrument Cluster - Functions Erratically
  • Air Injection System - Combi-valve Vacuum Hose, Seating
  • Mass Air Flow Sensor - Coated With Oil
    • Overview
    • Service Procedure
  • Evaporative Emissions System - Update
  • Emissions - Evaporative Emissions System Testing
  • Secondary Air Injection - Diagnosis Using VAG 1551
  • Secondary Air Injection System - Checking and Servicing