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Anthony, BMW Technician
Category: BMW
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Experience:  ASE Master Automobile Technician with over 20 years exp. in this field.
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What does fault code p1434 on a 2004 545i tell you Thanks

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What does fault code p1434 on a 2004 545i tell you
Thanks Brad

Hello! Welcome to justanswer!


That code is for usually leaving the fuel cap off while refueling or just a bad gas cap. Try replacing the fuel cap and resetting the code. The code means theres a large leak in the tank vent system. It will not make the engine run bad or cause a break down. In the worst case, the leak detection pump would have to be replaced.

Edited by Anthony on 12/19/2009 at 1:15 PM EST
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Customer: replied 7 years ago.
thanks for your help i will start there
You bet and thank you also. Happy Holidays!!!!

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