P2502high severityPowertrain
Charging System Voltage
on 2021 Nissan Leaf Electric 40kWh · FWD
What this code means
The system charging voltage is outside the expected regulation window.
Symptoms
- Battery light
- Check engine light
- Electrical accessories malfunction
- Battery drains overnight
Common causes
- Failed alternator
- Loose drive belt
- Battery terminal corrosion
- ECM-controlled charging fault
Diagnostic steps
- Check battery voltage engine off and running
- Inspect belt tension and condition
- Load test alternator
- Check battery terminals
Repair notes
Replace alternator or battery. Clean terminals. Check belt.
Other Powertrain codes on this vehicle
P0070
Ambient Air Temperature Sensor Circuit
P0071
Ambient Air Temperature Sensor Range/Performance
P0072
Ambient Air Temperature Sensor Circuit Low
P0073
Ambient Air Temperature Sensor Circuit High
P0115
Engine Coolant Temperature (ECT) Sensor 1 Circuit
P0116
ECT Sensor 1 Circuit Range/Performance
P0117
ECT Sensor 1 Circuit Low Input
P0118
ECT Sensor 1 Circuit High Input
P0119
ECT Sensor 1 Circuit Intermittent
P0125
Insufficient Coolant Temperature for Closed Loop Fuel Control