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 MANUALSAUDI199590 BASE, 2.8 A, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/O CODESINTRODUCTION

1995 Audi 90 Base, 2.8 A, Automatic

Engine Controls - Tests W/O Codes: Introduction

1995 Audi 90 Base, 2.8 A, AutomaticSECTION Introduction

Before diagnosing symptoms or intermittent faults, perform preliminary inspection and steps in appropriate TESTS W/CODES article below. Use this article to diagnose driveability problems existing when a hard trouble code is not present.

TESTS W/CODES (for A6)
TESTS W/CODES (for Cabriolet)
TESTS W/CODES (for 90)

NOTE: Some driveability problems may have been corrected by manufacturer with a revised computer calibration chip or Powertrain Control Module (PCM). Check with manufacturer for latest chip or PCM 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 apprpriate SYSTEM/COMPONENT TESTS article. below For specifications, see appropriate ADJUSTMENTS or SPECIFICATIONS articles below.

SPECIFICATIONS (for A6)
SPECIFICATIONS (for Cabriolet)
SPECIFICATIONS (for 90)
ADJUSTMENTS (for A6)
ADJUSTMENTS (for Cabriolet)
ADJUSTMENTS (for 90)
SYSTEM/COMPONENT TESTS (for A6)
SYSTEM/COMPONENT TESTS (for Cabriolet)
SYSTEM/COMPONENT TESTS (for 90)

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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.