What does code P1448 mean on BMW vehicles?
The ECU detects that the DM-TL pump speed or current is too low during switching.
OBD-II Code BMW
P1448 — BMW — Diagnostic Module Tank Leakage (DM-TL) Pump Too Low During Switching
The ECU detects that the DM-TL pump speed or current is too low during switching.
Common symptoms
- Check engine light illuminated
Possible causes
- Weak or failing DM-TL pump
Initial recommendation
Inspect DM-TL pump performance and replace pump if output is insufficient.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
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