P2501high severityPowertrain
Generator Lamp/L Terminal Circuit High
on 2017 Chevrolet Impala 2.5L I4 Ecotec · AWD
What this code means
High signal on alternator exciter circuit.
Symptoms
- Battery light behavior abnormal
- Overcharging possible
- Check engine light
Common causes
- Short to voltage in exciter wire
- Voltage regulator fault
- ECM communication issue
Diagnostic steps
- Measure exciter circuit voltage
- Check for shorts to power
- Test alternator output
Repair notes
Repair wiring or replace alternator.
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