P2501high severityPowertrain
Generator Lamp/L Terminal Circuit High
on 2007 Ram 3500 5.9L I6 Cummins · 4WD
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.
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Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0005
Fuel Shutoff Valve A Control Circuit/Open
P0006
Fuel Shutoff Valve A Control Circuit Low
P0007
Fuel Shutoff Valve A Control Circuit High
P0008
Engine Position System Performance - Bank 1
P0009
Engine Position System Performance - Bank 2
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1