P0622 Fault Code

Generator Field F Control Circuit Malfunction

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

The P0622 fault code indicates a malfunction in the generator field 'F' control circuit. This can lead to issues with the vehicle's charging system, affecting battery performance and the overall electrical system reliability.

What are the symptoms of the P0622 code?

Symptoms associated with this fault code often include:

• Warning lights on the dashboard (such as the battery warning light).
• Battery not charging properly.
• Dimming or flickering lights.
• Electrical accessories not functioning as expected.

What causes the P0622 code?

Common causes for the P0622 code include:

• Faulty voltage regulator.
• Damaged wiring or connectors in the field circuit.
• A malfunctioning generator.
• Poor grounding of the generator or circuit.

How to fix P0622?

To resolve the P0622 code, you should consider the following steps:

• Perform a visual inspection of the wiring and connectors related to the generator field circuit.
• Test the voltage regulator and replace if necessary.
• Check the generator for proper operation and replace if defective.
• Ensure that all ground connections are secure and corrosion-free.