Operation CHARM
: Car repair manuals for everyone.
Home
>>
Audi
>>
2008
>>
S4 Quattro Sedan (8EC) V8-4.2L (BHF)
>>
Repair and Diagnosis
>>
Powertrain Management
>>
Emission Control Systems
>>
Air Injection
>>
Service and Repair
>>
Procedures
Procedures
Secondary Air Injection, Servicing
The Secondary Air Injection system heats up the engine faster, and thereby the
catalytic converter
achieves operation readiness earlier after a cold start.