P2503
Charging System Voltage Low
2001-2003 BMW 525iT E39 2.5L I6 🇨🇦
High SeverityPowertrain
Description
Charging system output voltage is below minimum threshold.
Symptoms
- Battery light on
- Dimming lights
- Slow cranking
- Accessories failing
Common Causes
- Worn alternator
- Slipping belt
- High resistance connection
- Battery drawing excessive current
Diagnostic Steps
- Measure voltage at battery and alternator
- Check belt
- Load test battery
- Check cable connections
Repair Notes
Replace alternator. Inspect belt and cable connections.
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
P2503 on Other Vehicles
Common Questions
What does code P2503 mean on a 2001-2003 BMW 525iT E39?
P2503 stands for "Charging System Voltage Low". Charging system output voltage is below minimum threshold.
What are the symptoms of P2503 on a BMW 525iT E39?
Common symptoms of P2503 include: Battery light on, Dimming lights, Slow cranking, Accessories failing.
What causes P2503 on a 2001-2003 BMW 525iT E39?
Common causes of P2503 include: Worn alternator, Slipping belt, High resistance connection, Battery drawing excessive current.