BMW DTC P1444 – Diagnostic Module Tank Leakage (DM-TL) Pump Control Circuit/Open
DTC P1444 meaning on BMW
DTC P1444 on a BMW refers to the Diagnostic Module Tank Leakage (DM-TL) Pump Control Circuit/Open. This code indicates that there is an issue with the control circuit of the DM-TL pump, which is responsible for monitoring the fuel vapor system for leaks.
BMW DTC P1444 symptoms
Symptoms of DTC P1444 on a BMW may include:
- Check Engine Light illuminated
- Decreased fuel efficiency
- Strong fuel odor
- Failed emissions test
BMW DTC P1444 causes
Common causes of DTC P1444 on a BMW include:
- Faulty DM-TL pump
- Open or short circuit in the DM-TL pump control circuit
- Corroded or damaged wiring connections
BMW DTC P1444 seriousness
While DTC P1444 may not cause immediate drivability issues, it is important to address this code promptly. Ignoring the problem can lead to increased emissions, decreased fuel efficiency, and potential damage to the vehicle’s emissions system.
How to diagnose DTC P1444 on BMW
To diagnose DTC P1444 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault code
- Inspect the DM-TL pump and its control circuit for any visible damage
- Check the wiring connections for corrosion or breaks
- Test the DM-TL pump and control circuit for proper operation
How to fix DTC P1444 on BMW
To fix DTC P1444 on a BMW, the following steps may be taken:
- Replace the faulty DM-TL pump if necessary
- Repair any open or short circuits in the control circuit
- Repair or replace any damaged wiring connections
- Clear the fault code and test drive the vehicle to ensure the issue is resolved
How to erase DTC P1444 on BMW
To erase DTC P1444 on a BMW, the fault code can be cleared using a diagnostic scanner. After the repair has been completed, the code can be cleared, and the vehicle can be retested to ensure the issue 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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