BMW DTC P144D – Fan Safety Relay Circuit Low
DTC P144D meaning on BMW
The Diagnostic Trouble Code (DTC) P144D for BMW refers to the Fan Safety Relay Circuit Low. This code indicates that there is a problem with the electrical circuit related to the fan safety relay, which is responsible for controlling the operation of the cooling fan in the vehicle.
BMW DTC P144D symptoms
Symptoms of the BMW DTC P144D may include:
- Engine overheating
- Malfunctioning cooling fan
- Check Engine Light illuminated on the dashboard
BMW DTC P144D causes
Common causes of the BMW DTC P144D include:
- Faulty fan safety relay
- Short circuit in the fan relay circuit
- Loose or damaged electrical connections
BMW DTC P144D seriousness
The BMW DTC P144D is a serious issue as it can lead to engine overheating, which may cause damage to engine components if not addressed promptly. It is important to diagnose and fix this issue to prevent potential engine damage.
How to diagnose DTC P144D on BMW
To diagnose the DTC P144D on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer.
- Inspect the fan safety relay and its connections for any visible damage or corrosion.
- Check the wiring harness for any signs of wear or damage.
- Test the fan safety relay using a multimeter to ensure it is functioning properly.
How to fix DTC P144D on BMW
To fix the DTC P144D on a BMW, you can follow these steps:
- Replace the faulty fan safety relay with a new one.
- Repair any damaged or corroded electrical connections in the fan relay circuit.
- Ensure all wiring harnesses are properly connected and free of damage.
- Clear the fault codes using a diagnostic scanner after completing the repairs.
How to erase DTC P144D on BMW
To erase the DTC P144D on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer. After completing the necessary repairs to fix the issue causing the fault code, you can reset the codes to turn off the Check Engine Light and ensure 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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