Engine Controls - Basic Testing: Summary

If no faults were found while performing BASIC DIAGNOSTIC PROCEDURES, For additional information, see appropriate TESTS W/CODES articles below;

• A4 1.8T - Turbo see TESTS W/CODES article,
• A4 2.8T see TESTS W/CODES article,
• Cabriolet see TESTS W/CODES article.

If no hard codes are found in self-diagnostics, proceed to H - TESTS W/O CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.