P2504critical severityPowertrain
Charging System Voltage High
on 2023 BMW i7 M70 Dual Motor AWD · 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
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