RS 4 Quattro Sedan V8-4.2L (BNS) (2007)
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Intake Manifold: Customer Interest
Engine - MIL ON/Multiple DTC's/Poor Performance
01 Poor performance because of leak in vacuum system
24 10 32
2017521/3
June 16, 2010
Supersedes Technical Service Bulletin Group 24 number 08-65 dated November 19, 2008 for reasons listed below.
Affected Vehicles
Condition
^ MIL on.
^ DTC code entry such as P2004, P2005, P2006, P2007, P2070, or P2071 (intake manifold tumble flaps adjustment implausible signal).
^ Rattling noises from rear of vehicle. Exhaust flaps rattle during the catalyst heating phase.
^ Air filter box power flap inoperative.
^ Poor engine performance because of inoperative intake manifold tumble flaps or air filter box power flap.
^ Possible fault entry for "leak diagnosis pump."
Technical Background
Vacuum level becomes too low because of:
^ Damaged, torn or kinked vacuum hoses.
^ Loose vacuum hose connections.
Vacuum leaks slightly decrease engine performance because of the lack of additional air entering the engine at high RPM. This condition does not cause
stalling.
Production Solution
No change.
