P2504critical severityPowertrain
Charging System Voltage High
on 2021 Polestar 2 Long Range Single Motor FWD · AWD
What this code means
Charging system output voltage exceeds maximum safe threshold.
Symptoms
- Battery boiling/swelling
- Bulbs burning out frequently
- Check engine light
- Electrical component damage
Common causes
- Failed voltage regulator
- ECM charging control fault
- Ground strap issue
Diagnostic steps
- Measure charging voltage at various RPM
- Check voltage regulator
- Inspect ground straps
Repair notes
Replace alternator or voltage regulator. Check and repair grounds. Overcharging can damage expensive electronics.
Other Powertrain codes on this vehicle
P0070
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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