CoolingSeverity Medium: diagnose soon

P0481Fan 2 Control Circuit

What it means

The ECU sees an electrical fault in the circuit that switches cooling fan 2 (relay, module or the fan itself). If the fan doesn't run, the engine can overheat in traffic.

Symptoms

Temperature rises in slow traffic
Fan runs all the time or never
Air conditioning works poorly at standstill

Common causes

Faulty fan relay or fan control module
Seized or worn fan motor
Wiring or connector fault
Blown fan fuse

What to check first

Command the fan with the scan tool
Check fuse, relay and the fan supply under load
Measure fan current and check the motor for tight spots

Can I drive with P0481? Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.

Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.

Cases with P0481 (0)

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P0481: questions and answers

What does P0481 mean?

P0481: Fan 2 Control Circuit. The ECU sees an electrical fault in the circuit that switches cooling fan 2 (relay, module or the fan itself). If the fan doesn't run, the engine can overheat in traffic.

What are the symptoms of P0481?

Temperature rises in slow traffic. Fan runs all the time or never. Air conditioning works poorly at standstill.

What causes P0481?

Faulty fan relay or fan control module. Seized or worn fan motor. Wiring or connector fault. Blown fan fuse.

How do you diagnose P0481?

1. Command the fan with the scan tool 2. Check fuse, relay and the fan supply under load 3. Measure fan current and check the motor for tight spots

Can I drive with P0481?

Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.