P0485 Fault Code

Cooling Fan Power/Ground Circuit Malfunction

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

The P0485 fault code indicates a malfunction in the cooling fan power or ground circuit. This usually points to an issue with the wiring, connectors, or the fan control module that manages the cooling fan's operation. Proper cooling is crucial for maintaining engine performance and preventing overheating.

What are the symptoms of the P0485 code?

• Overheating engine
• Check Engine Light illuminated
• Non-operational cooling fan
• Fluctuating coolant temperatures on the gauge
• Possible reduction in engine performance due to overheating

What causes the P0485 code?

• Damaged wiring or connectors in the cooling fan circuit
• A failing cooling fan motor
• Issues with the fan relay or fuse
• Problems within the engine control module (ECM)
• Poor ground connection affecting fan operation

How to fix P0485?

• Inspect the wiring and connectors in the cooling fan circuit for damage or corrosion
• Test the cooling fan motor for proper operation and replace if necessary
• Check and replace any blown fuses or faulty relays related to the cooling fan
• Ensure that the ground connection is secure and functioning
• Use a scan tool to check for other related fault codes and address them accordingly