P0481 code meaning
Fan 2 Control Circuit
Powertrain system Generic code P04xx codes Check engine light
What P0481 means
The engine module switches the radiator fan either through a relay, whose coil it pulls to ground, or with a PWM signal to a fan control module. The circuit is an output that CARB requires to be checked continuously. P0481 concerns the second fan control circuit – depending on the design a second fan or a second speed stage; on GM and Saab, relays 2 and 3 switch the fans in series or parallel for low and high speed. GM sets it for an open circuit (200 kΩ or more, 50 of 63 samples, MIL after two trips) and reports shorts as P0693/P0694. Ford's OBD summaries do not contain the code. One fan stage then fails or runs constantly; cooling usually remains partly available.
P0481 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P0481
- Check engine light on
- One fan stage or fan not working, or running constantly
- Temperature rises at standstill
Common causes of P0481
- Most likelyFan relay 2 (or 2/3) faulty
- PossibleCorrosion or water in relay or fan connector
- PossibleControl wire open or shorted to ground
- Less likelyDriver in the engine module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Cooling fan 2Fan relayEngine control module
What each part of P0481 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 81 | The exact fault in that area. |
What to do next
- Note P0481 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0481
What does P0481 mean?
P0481 means "Fan 2 Control Circuit". The engine module switches the radiator fan either through a relay, whose coil it pulls to ground, or with a PWM signal to a fan control module. It is a generic code, so it means the same on every make.
Is it safe to drive with P0481?
Drive gently and only to a workshop. With P0481 the car can go into limp mode (reduced power) to protect itself.
Will P0481 fail an emissions test?
Yes, it can. P0481 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0481 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0481 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.