P0503moderate severityPowertrain
Vehicle Speed Sensor A Intermittent/Erratic/High
on 2015 Tesla Model S P85D Dual Motor AWD · AWD
What this code means
Intermittent or erratic VSS signal.
Symptoms
- Erratic speedometer
- Random shifts
- Intermittent cruise issues
Common causes
- Loose connector
- Damaged wiring
- Worn tone ring
- Sensor going bad
Diagnostic steps
- Wiggle test connector
- Monitor signal stability
- Inspect tone ring
Repair notes
Repair connector or replace sensor.
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