Home >> Audi >> 2002 >> allroad Standard >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Exhaust System - 2.7L V6 BITURBO - APB, Bel >> Exhaust system, Emission controls >> Secondary air system >> Secondary Air Injection (AIR) solenoid valve -N112-, checking >> Special tools and equipment