Strange noises from under the bonnet? Spooky. Happy Halloween from Auto Veteran: may your only scares be costumes.
P1449 on BMW vehicles indicates that the Diagnostic Module Tank Leakage (DM-TL) pump is reporting a signal that is too high, meaning the pump's electrical circuit is drawing excessive current or the pump itself is failing. The engine control module detects this out-of-range condition during its evaporative emission system self-test and stores the fault.
Guidance is general and written for BMW vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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