BMW DTC P1485 – Engine Cooling Fan Relay 2 Control Circuit High
DTC P1485 meaning on BMW
The Diagnostic Trouble Code (DTC) P1485 for BMW indicates an issue with the Engine Cooling Fan Relay 2 Control Circuit being detected as high. This means that the control circuit for the second engine cooling fan relay is experiencing a higher than normal voltage, which can lead to problems with the operation of the cooling fan system.
BMW DTC P1485 symptoms
Symptoms of DTC P1485 on a BMW may include:
- Engine overheating
- Malfunctioning or constantly running cooling fan
- Check Engine Light illuminated on the dashboard
BMW DTC P1485 causes
Common causes of DTC P1485 on a BMW include:
- Defective engine cooling fan relay
- Faulty wiring or connections in the cooling fan relay circuit
- Issues with the engine cooling fan itself
BMW DTC P1485 seriousness
The seriousness of DTC P1485 on a BMW lies in the potential for engine overheating, which can lead to severe engine damage if not addressed promptly. Ignoring this issue can result in costly repairs and possible engine failure.
How to diagnose DTC P1485 on BMW
To diagnose DTC P1485 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes from the vehicle’s computer
- Inspect the engine cooling fan relay and its connections for any visible damage or corrosion
- Test the voltage in the cooling fan relay circuit to determine if it is higher than normal
How to fix DTC P1485 on BMW
To fix DTC P1485 on a BMW, you can try the following solutions:
- Replace the engine cooling fan relay if it is found to be defective
- Repair any damaged wiring or connections in the cooling fan relay circuit
- If the engine cooling fan is faulty, replace it with a new one
How to erase DTC P1485 on BMW
To erase DTC P1485 on a BMW, you can clear the fault codes using a diagnostic scanner. After fixing the underlying issue causing the fault code, you can reset the codes to turn off the Check Engine Light and ensure that the problem has been resolved.
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
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