P0485

Symptoms

• Check Engine Light Is On
• The fan doesn't work at all
• Engine overheating in traffic jams and under high load
• Air conditioner performance deterioration
• Coolant temperature is higher than normal

Causes

• Broken fan power cable
• Poor contact or broken ground wire (ground)
• Oxidized ground terminals on the body or engine
• Faulty fan power relay
• Blown fan power circuit fuse
• Oxidation of the fan motor connector
• Damage to wiring due to temperature or vibration

How to Fix

1. Check the fan power circuit fuses according to the car diagram
2. Check the fan relay - replace it with a similar one to check
3. Measure the supply voltage at the fan connector (should be ~12V when commanded to turn on)
4. Check the grounding: measure the resistance between the minus of the fan connector and the body (should be <0.5 Ohm)
5. Inspect the attachment points of the mass wires - clean them from rust and oxidation
6. Check the fan motor by applying power directly from the battery
7. Repair damaged wiring or replace connector
8. Reset codes after repair

Related codes

Error P0485 by Vehicle Brand