BMW DTC P1484 – Engine Cooling Fan Relay 2 Control Circuit Low
DTC P1484 meaning on BMW
The Diagnostic Trouble Code (DTC) P1484 for BMW indicates an issue with the Engine Cooling Fan Relay 2 Control Circuit being detected as low. This means that the control circuit for the second engine cooling fan relay is experiencing a voltage level below the specified threshold, causing the engine cooling fan system to malfunction.
BMW DTC P1484 symptoms
Symptoms of DTC P1484 on a BMW may include:
- Engine overheating
- Engine temperature gauge reading higher than normal
- Check Engine Light (CEL) illuminated on the dashboard
- Reduced engine performance
BMW DTC P1484 causes
Common causes of DTC P1484 on a BMW include:
- Defective engine cooling fan relay
- Wiring or connection issues in the cooling fan relay circuit
- Faulty engine cooling fan motor
- Issues with the engine control module (ECM)
BMW DTC P1484 seriousness
The seriousness of DTC P1484 on a BMW lies in the potential for engine overheating and subsequent damage if the cooling fan system is not functioning properly. It is important to address this issue promptly to prevent engine damage and ensure proper engine cooling.
How to diagnose DTC P1484 on BMW
To diagnose DTC P1484 on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes from the engine control module
- Inspect the engine cooling fan relay 2 and its connections for any visible damage or corrosion
- Check the wiring harness for any signs of wear or damage
- Test the engine cooling fan relay and motor for proper functionality
How to fix DTC P1484 on BMW
To fix DTC P1484 on a BMW, you can try the following solutions:
- Replace the faulty engine cooling fan relay 2
- Repair or replace any damaged wiring or connections in the cooling fan relay circuit
- If the engine cooling fan motor is faulty, replace it with a new one
- If necessary, reprogram or replace the engine control module (ECM)
How to erase DTC P1484 on BMW
To erase DTC P1484 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the engine control module. After addressing the underlying issue causing the fault code, clearing the code will reset the Check Engine Light and ensure that the repair was successful.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.