Repair manual

SULEV 2.0L TFSI Engine
26
Introduction
With the introduction of the 2.0L CAEB engine, Audi
was able to combine direct fuel injection, AVS, and
turbocharging while still meeting the stringent ULEV II
exhaust emission limits.
However, some states require the even more stringent
SULEV exhaust emission standards.
The measures undertaken to comply with the SULEV
exhaust emission regulations will be explained in detail
on the following pages. The technical descriptions refer
to the Audi A3.
To homologate a vehicle for the North American market,
the following conditions must be met:
– Compliance with statutory exhaust emission limits
– No hydrocarbon emission from the fuel system
– All exhaust-related systems and components
monitored to OBD II requirements
– Compliance with SULEV exhaust emission limits
ensured over 150,000 miles (240,000 km) and 15 years