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 DIAGNOSISBRAKESTRACTION CONTROLANTI-LOCK BRAKE SYSTEM/TRACTION CONTROL - 5.3DTC TESTINGDTC 00285: RIGHT FRONT WHEEL SPEED SENSOR
1998 Audi A4 Avant Quattro, Automatic
DTC 00285: Right Front Wheel Speed Sensor
1998 Audi A4 Avant Quattro, AutomaticSECTION DTC 00285: Right Front Wheel Speed Sensor
- Fault may be caused by the following:
- Right front wheel speed sensor or speed sensor rotor is dirty or damaged.
- Right front wheel speed sensor not properly installed.
- Excessive wheel bearing play.
- Faulty wheel speed sensor.
- Open or short in wiring between wheel speed sensor and ABS control module.
- Incorrect ABS control module identification.
- Perform a visual check on the above items. If inspection is inconclusive, check wheel speed sensor function. Using VAG 1551 scan tool, select function 08 - READ MEASURING VALUE BLOCK. Select DISPLAY GROUP 001. Drive vehicle to ensure all wheel speeds are within one km/h of each other. Raise and support vehicle. Check wheel speed value while rotating each wheel one at a time.
- Perform step 4) under CIRCUIT TESTS . If fault remains after performing circuit test, check wiring harness and connectors for poor contact, corrosion, etc. If okay, check ABS control module identification. See ABS CONTROL MODULE . If fault still exists, substitute known-good control module and recheck for symptom and DTC.
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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.