BMW DTC P1447 – Diagnostic Module Tank Leakage (DM-TL) Pump Current Too High during Switching Solenoid Test
DTC P1447 meaning on BMW
The Diagnostic Trouble Code (DTC) P1447 for BMW refers to an issue with the Diagnostic Module Tank Leakage (DM-TL) pump current being too high during the switching solenoid test. This code indicates a malfunction in the system responsible for detecting fuel vapor leaks in the vehicle’s fuel system.
BMW DTC P1447 symptoms
Symptoms of DTC P1447 on a BMW may include:
- Check Engine Light (MIL) illuminated
- Decreased fuel efficiency
- Strong fuel odor near the vehicle
- Issues with passing emissions tests
BMW DTC P1447 causes
Common causes of DTC P1447 on a BMW include:
- Faulty DM-TL pump
- Defective switching solenoid
- Leaks in the fuel vapor system
- Electrical issues in the DM-TL system
BMW DTC P1447 seriousness
While DTC P1447 may not cause immediate drivability issues, it is important to address this code promptly. Ignoring the problem can lead to increased emissions, potential fuel leaks, and may cause the vehicle to fail emissions tests.
How to diagnose DTC P1447 on BMW
To diagnose DTC P1447 on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the DM-TL pump and switching solenoid for any visible damage or leaks
- Check the electrical connections and wiring related to the DM-TL system
- Perform a smoke test to detect any fuel vapor leaks in the system
How to fix DTC P1447 on BMW
To fix DTC P1447 on a BMW, you can try the following solutions:
- Replace the faulty DM-TL pump or switching solenoid
- Repair any leaks in the fuel vapor system
- Clean or replace the fuel cap if it is not sealing properly
- Clear any obstructions in the DM-TL system
How to erase DTC P1447 on BMW
To erase DTC P1447 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer. After addressing the underlying issue causing the code, clearing the code will reset the Check Engine Light and turn off the MIL.
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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