P2504
Charging System Voltage High
1999-2000 BMW 323i E46 2.5L I6
Critical SeverityPowertrainGeneric (SAE)
Description
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.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P2504 on Other Vehicles
Common Questions
What does code P2504 mean on a 1999-2000 BMW 323i E46?
P2504 stands for "Charging System Voltage High". Charging system output voltage exceeds maximum safe threshold.
What are the symptoms of P2504 on a BMW 323i E46?
Common symptoms of P2504 include: Battery boiling/swelling, Bulbs burning out frequently, Check engine light, Electrical component damage.
What causes P2504 on a 1999-2000 BMW 323i E46?
Common causes of P2504 include: Failed voltage regulator, ECM charging control fault, Ground strap issue.