P2501
Generator Lamp/L Terminal Circuit High
2000-2002 Rolls-Royce Corniche 6.75L V8
High SeverityPowertrainGeneric (SAE)
Description
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.
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
P2501 on Other Vehicles
Rolls-Royce Cullinan
2019-2024 6.75L V12 Twin Turbo
Rolls-Royce Dawn
2016-2024 6.6L V12 Twin Turbo
Rolls-Royce Ghost
2010-2024 6.6L V12 Twin Turbo
Rolls-Royce Phantom VII
2003-2017 6.75L V12
Rolls-Royce Phantom VIII
2018-2024 6.75L V12 Twin Turbo
Rolls-Royce Silver Seraph
1998-2002 5.4L V12
Rolls-Royce Silver Spirit
1990-1998 6.75L V8
Rolls-Royce Silver Spur
1990-1998 6.75L V8
Common Questions
What does code P2501 mean on a 2000-2002 Rolls-Royce Corniche?
P2501 stands for "Generator Lamp/L Terminal Circuit High". High signal on alternator exciter circuit.
What are the symptoms of P2501 on a Rolls-Royce Corniche?
Common symptoms of P2501 include: Battery light behavior abnormal, Overcharging possible, Check engine light.
What causes P2501 on a 2000-2002 Rolls-Royce Corniche?
Common causes of P2501 include: Short to voltage in exciter wire, Voltage regulator fault, ECM communication issue.