P0502moderate severityPowertrain
Vehicle Speed Sensor A Low Input
on 2021 Nissan Leaf Electric 40kWh · FWD
What this code means
Low or no signal from VSS.
Symptoms
- Speedometer reads zero
- No shifting
- Cruise control dead
Common causes
- Faulty VSS
- Open circuit
- Disconnected sensor
Diagnostic steps
- Test signal output
- Check wiring
- Test sensor
Repair notes
Replace VSS or repair wiring.
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