P0481 Fault Code

Cooling Fan 2 Control Circuit Malfunction

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

The P0481 error code indicates a malfunction in the Cooling Fan 2 Control Circuit. This issue can compromise the engine's ability to maintain optimal temperatures, potentially leading to overheating or other thermal management problems. Proper functioning of the cooling fan is essential for effective engine cooling, especially during operation in heavy traffic or under high loads.

What are the symptoms of the P0481 code?

Symptoms that may be associated with this code include:

• Engine overheating
• Air conditioning performance issues
• Erratic cooling fan operation (fan running constantly or not at all)
• Increased engine temperature gauge readings
• Dashboard warning lights related to temperature or cooling system

What causes the P0481 code?

Common causes of the P0481 fault code include:

• Faulty cooling fan relay
• Damaged or corroded wiring in the cooling fan circuit
• Defective coolant temperature sensor
• Malfunctioning Engine Control Module (ECM)
• Blocked or restricted radiator airflow
• Failed cooling fan motor

How to fix P0481?

To address the P0481 fault code, follow these steps:

1. Use a diagnostic scanner to confirm the error code and check for related codes.
2. Inspect the cooling fan relay and replace if faulty.
3. Examine wiring and connectors for damage or corrosion; repair or replace as needed.
4. Test the coolant temperature sensor for proper operation and replace if necessary.
5. Verify the functionality of the cooling fan motor and replace if it does not operate correctly.
6. Clear the error codes and conduct a road test to ensure the issue is resolved.