P0625 Fault Code

Generator Field Terminal Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0625 fault code indicates an issue with the generator field terminal circuit, which is responsible for controlling the generator's output voltage. This code typically means that there is a low voltage signal being reported from the field terminal, which can lead to insufficient charging of the battery and potential electrical issues in the vehicle.

• The generator field terminal circuit regulates the flow of current to the generator.
• A low signal may suggest a wiring issue, a failing generator, or an issue with the voltage regulation system of the vehicle.

What are the symptoms of the P0625 code?

When experiencing a P0625 fault code, you may observe the following symptoms:

• Battery warning light illuminated on the dashboard.
• Dimming or flickering headlights and interior lights.
• Difficulty starting the vehicle, especially after prolonged periods of inactivity.
• Electrical accessories may not operate properly due to insufficient power supply.

What causes the P0625 code?

The primary causes for the P0625 fault code can include:

• Damaged or corroded wiring in the generator field circuit.
• A faulty generator or voltage regulator that is unable to provide the necessary output.
• Poor connections or grounds within the charging system, leading to inadequate voltage transmission.

How to fix P0625?

To resolve the P0625 fault code, the following steps are recommended:

• Inspect the generator field terminal wiring for any signs of damage or corrosion.
• Check the connections for looseness and clean any corroded terminals.
• Test the generator and voltage regulator to ensure they are functioning correctly. Replace if faulty.
• Clear the fault code and perform a road test to confirm the issue is resolved.