Fault code P1481 – a step-by-step guide to diagnosing and fixing it

The meaning of error code P1481 – Fan Secondary Low With High Fan On

P1481: Causes, signs and repairs

Error code P1481 is displayed and the check engine light is on - what does this mean?

The DTC P1481 is recognized by the OBD/EOBD system when there is a problem with the cooling fan control circuit. This manufacturer-specific fault code mainly affects the cooling system and the electronic fan control. The exact definition of code P1481 may vary slightly for different vehicle brands.

What causes can this fault code have?

Defective radiator fan motor
Damaged fan control unit
Broken cable connections to the fan
Defective fan relay
Corroded plug connections
Defective fuse in the fan circuit
Faulty temperature sensors
Damaged wiring in the control circuit

What symptoms occur in parallel with error code P1481?

Motor overheating: The motor reaches unusually high operating temperatures
Fan not running: The radiator fan does not switch on even though the engine is hot
Fan runs continuously: The fan runs continuously, even when the engine is cold
Temperature warning light: The coolant temperature warning light comes on
Reduced engine power: The engine goes into emergency running mode
Irregular fan noise: Abnormal noise from the fan area

How to fix the problem of error code P1481?

Repairing error code P1481 requires a systematic diagnosis of the cooling fan system.
Checking and replacing the cooling fan motor in the event of mechanical defects or electrical failures
Replacing the fan control unit if the electronic control is faulty
Repairing or replacing damaged cable connections between the control unit and fan
Replacement of defective relays in the fan circuit after functional testing
Cleaning corroded plug connections and applying contact spray
Replacing blown fuses and checking the cause of the fault
Replacing faulty temperature sensors that are sending incorrect signals to the control unit

FAQ - Frequently asked questions about DTC P1481

Can I continue driving with error code P1481?

Short distances are possible, but you should constantly monitor the engine temperature. Stop immediately if there are signs of overheating, as there is a risk of serious engine damage.

How much does it cost to repair error code P1481?

The costs vary between 50-400 euros, depending on the cause. A new fan motor costs around 80-200 euros, a control unit 150-300 euros, relays and fuses less than 20 euros.

How do I recognize a defective radiator fan on P1481?

Start the engine and let it warm up. The fan should switch on when it reaches operating temperature. If it remains silent or runs continuously, there is a fault.

Can I repair fault code P1481 myself?

Simple repairs such as replacing fuses or relays are feasible. More complex work on the control unit or the wiring should be carried out by specialists.

How long does it take to repair P1481?

Depending on the cause, between 30 minutes (fuse/relay) and 3 hours (fan motor or control unit). The diagnosis takes an additional 30-60 minutes.

Does error code P1481 occur depending on the season?

Yes, more frequently in summer when outside temperatures are high, as the cooling system is subject to greater stress. Corrosion problems can also occur after long periods of inactivity.

Vehicles in which fault code P1481 occurs most frequently

Error code P1481 is a manufacturer-specific trouble code for problems with the cooling fan control circuit and can occur in various vehicle brands, but is most common in the following vehicles:

Ford: Focus, Fiesta, Mondeo, Ka (1998-2010)
Mazda: 323, 626, Premacy, Demio (1995-2008)
Volvo: S40, V40, S60, V70 (1995-2005)
Opel: Astra, Corsa, Vectra, Zafira (1998-2012)
Peugeot: 206, 307, 406, Partner (1999-2010)
Citroën: C3, C4, Xsara, Berlingo (2000-2011)
Renault: Clio, Megane, Scenic, Laguna (1997-2009)

If the code P1481 occurs in your vehicle, you should first check the cooling fan function and have the EOBD system read out. An early diagnosis can prevent expensive consequential damage to the engine due to overheating. If problems persist, a visit to a specialist workshop is recommended, as modern fan control systems are complex and require special diagnostic equipment.

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