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HOMESERVICE MANUALSAUDI1996A4 BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)EXTERNAL PAGESDIFFERENT CARSECTION 9 (ENGINE CONTROLS - TROUBLE SHOOTING - NO CODES)INTRODUCTION
1996 Audi A4 Base, Standard

Section 9 (Engine Controls - Trouble Shooting - No Codes): Introduction

1996 Audi A4 Base, StandardSECTION Introduction
WARNING: This page is about a different car, the 2002 Audi S4 and 2001 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.

Before diagnosing symptoms or intermittent faults, perform preliminary inspection and steps in appropriate SELF-DIAGNOSTICS article. Use this article to diagnose driveability problems existing when a hard trouble code is not present.

NOTE: Some driveability problems may have been corrected by manufacturer with a revised Engine Control Module (ECM). Check with manufacturer for latest ECM application.

Symptom checks can direct the technician to malfunctioning component(s) for further diagnosis. A symptom should lead to a specific component, system test or adjustment. See SYMPTOMS  .

Use intermittent test procedures to locate driveability problems that do not occur when the vehicle is being tested. These test procedures should also be used if a soft (intermittent) trouble code was present but no problem was found during self-diagnostic testing. See INTERMITTENTS  .

NOTE: For specific testing procedures, see SYSTEM & COMPONENT TESTING article. For specifications, see ON-VEHICLE ADJUSTMENTS or SERVICE & ADJUSTMENT SPECIFICATIONS article.

Many computer-controlled and/or monitored components set a Diagnostic Trouble Code (DTC) if they malfunction. In this event testing is incorporated in self-diagnostics testing. For testing procedures, see appropriate SELF-DIAGNOSTICS article. For systems and components not covered in this article, use self-diagnostics testing procedures.

For aid in locating components, see component location illustrations in REMOVAL, OVERHAUL & INSTALLATION article.

RENDER: 1.0x

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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.