Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI1998A4 AVANT QUATTRO, AUTOMATICREPAIR AND DIAGNOSISQUICK LOOKUPSTECHNICAL BULLETINSTECHNICAL SERVICE BULLETINSOTHER VARIANTENGINE CONTROL SYSTEMSVAG 1687 DIAGNOSTIC TOOL, CHECKING INTAKE SYSTEM FOR LEAKS (GROUP 01, NO. 01-01)
1998 Audi A4 Avant Quattro, Automatic
VAG 1687 Diagnostic Tool, Checking Intake System For Leaks (GROUP 01, NO. 01-01)
1998 Audi A4 Avant Quattro, AutomaticSECTION VAG 1687 Diagnostic Tool, Checking Intake System For Leaks (GROUP 01, NO. 01-01)
WARNING: This page is about the A4 Base, 1.8 B, Automatic, which is a different variant/trim than selected.
Publication date: 2001-10-26Reference number: GROUP 01, NO. 01-01
VAG 1687 DIAGNOSTIC TOOL, CHECKING INTAKE SYSTEM FOR LEAKS
TECHNICAL SERVICE BULLETIN
Reference Number(s): GROUP 01, NO. 01-01, Date of Issue:
October 26, 2001
| AUDI: | 1997-on All With 1.8L Turbo; 2000-on All with 2.7L BiTurbo |
| GROUP: | 01 - On Board Diagnostic (OBD) |
DESCRIPTION
VAG 1687 Diagnostic Tool, Checking Intake System for Leaks
Diagnostic trouble codes (DTC's) related to fuel trim, charge (boost) 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.
BULLETIN CONTENT
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.