P2503high severityPowertrain
Charging System Voltage Low
on 2017 Chevrolet Impala 2.5L I4 Ecotec · AWD
What this code means
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.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1