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 DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXA/C-HEATER SYSTEM DTCS
1998 Audi A4 Avant Quattro, Automatic
A/C-Heater System DTCS
1998 Audi A4 Avant Quattro, AutomaticSECTION A/C-Heater System DTCS
A/C-HEATER SYSTEM DTCS
| DTC | Probable Cause |
|---|---|
| 00000 | No DTC Recognized |
| 00532 | Supply Voltage Too Low |
| 00600 | Temperature Regulator Flap Motor Position Sensor |
| 00601 | Central Flap Motor Position Sensor |
| 00602 | Footwell/Defroster Motor Position Sensor |
| 00603 | Footwell/Defroster Flap Motor |
| 00604 | Back Pressure Flap Motor Position Sensor |
| 00625 | Road Speed Signal |
| 00779 | Outside Air Temperature Sensor |
| 00785 | Instrument Panel Interior Temperature Sensor |
| 00787 | Fresh Air Intake Duct Temperature Sensor |
| 00792 | A/C Pressure Switch (Short Circuit To Ground) |
| 00797 | Sunlight Photo Sensor |
| 01206 | Signal For Time Span Ignition Off - Incorrect Signal |
| 01271 | Temperature Regulator Flap Motor |
| 01272 | Central Air Flap Motor |
| 01273 | Fresh Air Blower |
| 01274 | Airflow Flap Motor |
| 01296 | Outlet Temperature Center (Short Circuit To Ground Or Voltage) |
| 01297 | Outlet Temperature Floor Outlet (Short Circuit To Ground Or Voltage) |
| 65535 | A/C Control Head Malfunction |
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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.