Intake system, checking for leaks using Diagnostic Tool VAG1687: Notes

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, and 2003 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Diagnostic trouble codes (DTCs) related to fuel trim, charge pressure or mass air flow (MAF) may be caused by:

Leaking (worn/torn) intake hoses during charge conditions
Incorrectly torqued or improperly placed clamps on intake hoses etc. causing leaks during charge conditions

Fig 1: Checking Charge Air Pressure System Using Vag1687 Charge Air System Tester

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check the charge air pressure system using the VAG1687 Charge air system tester.