audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

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Principle and function > < Checking exhaust system for leaks

A4 Mk1

Secondary air system - vehicles with engine code AHA, ALF, ALG, AML, AMM, AQD, ARJ, ATQ
Secondary air system - vehicles with engine code AHA, ALF, ALG, AML, AMM, AQD, ARJ, ATQ
The secondary air system is designed to enable the catalytic converter to heat up and reach its operating temperature more quickly after a cold start.
   

Principle and function > < Checking exhaust system for leaks