P0501moderate severityPowertrain
Vehicle Speed Sensor A Range/Performance
on 1997 Audi A4 2.8L V6 · AWD
What this code means
The VSS reading is out of expected range.
Symptoms
- Speedometer erratic
- Harsh or erratic shifting
Common causes
- Sensor issue
- Tone ring damage
- Interference from other signals
Diagnostic steps
- Compare VSS to wheel speed sensors
- Check tone ring
- Monitor signal pattern
Repair notes
Replace VSS or repair tone ring.
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