SOURCE: exterior door trim
The molding in the middle of the door clips on. Remove interior door panel to access the clips, they usually break off. Or do you mean the black tapes (stickers) around the window opening, they are just stickers. Take a heat gun to loosen glue and peel off.
SOURCE: Vacuum leak-P0171 2000 Toyota Echo. Need vacuum diagram
A P0171 code does not indicate a vacuum leak; it indicates a dirty mass air flow sensor. This device is located between the air filter box and the intake manifold. Locate it, unplug the wire harness, and remove the 2 screws that holds it onto the intake pipe. Look down inside th sensor, you will see 2 small wires, that are probably covered with fuzzy things...using a spray cleaner, such as brake cleaner, spray the 2 wires until they are clean and shiny. Do NOT use compressed air, that will damage the sensor. When it is clean; reinstall it and drive it. The computer will recognize the now clean sensor, and your troubles will be over.
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