Charging System Voltage Too High
1998-2004 Dodge Intrepid 3.2L V6
Description
The PCM has detected that the charging system voltage is above the acceptable range. The voltage regulator in the alternator is allowing excessive voltage, which can damage electrical components and boil battery electrolyte.
Symptoms
- Check Engine Light
- Battery warning light may illuminate
- Electrical components failing prematurely
- Battery swelling or leaking
- Headlights excessively bright
Common Causes
- Faulty voltage regulator in alternator
- Poor ground connection at alternator
- Corroded battery cables
- Faulty PCM voltage sense circuit
- Wiring issue in charging circuit
Diagnostic Steps
- Measure charging voltage at battery with engine running (should be 13.5-14.8V)
- Check alternator ground connection
- Inspect battery cables and terminals for corrosion
- Test voltage regulator function
- Check PCM voltage sense wire
Repair Notes
Replace the alternator if the voltage regulator is causing overcharging.
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
P1594 on Other Vehicles
Common Questions
What does code P1594 mean on a 1998-2004 Dodge Intrepid?
P1594 stands for "Charging System Voltage Too High". The PCM has detected that the charging system voltage is above the acceptable range. The voltage regulator in the alternator is allowing excessive voltage, which can damage electrical components and boil battery electrolyte.
What are the symptoms of P1594 on a Dodge Intrepid?
Common symptoms of P1594 include: Check Engine Light, Battery warning light may illuminate, Electrical components failing prematurely, Battery swelling or leaking, Headlights excessively bright.
What causes P1594 on a 1998-2004 Dodge Intrepid?
Common causes of P1594 include: Faulty voltage regulator in alternator, Poor ground connection at alternator, Corroded battery cables, Faulty PCM voltage sense circuit, Wiring issue in charging circuit.