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Paul M ASE Master
Paul M ASE Master, ASE Master Tech
Category: Car
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Experience:  Ase Master 20+ Years Experience Foreign and Domestic
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Help,p0171 code lean bank 1..intake gasket..rings

Resolved Question:

help,p0171 code lean bank 1 after intake replaced,did he mess up intake gasket or o-rings??
Submitted: 7 years ago.
Category: Car
Expert:  Paul M ASE Master replied 7 years ago.

Hello and thank you for using Just Answer


upper intake manifold leak can set this code


if you use a can of carb/throttle body cleaner you can spray around the intake while it is idling if the idle raises up you have found a vacuum leak


make sure there are no vacuum leaks around the engine and all hoses are connected


if you have a leak the idle will raise when you spray the cleaner on it.


have you asked the mechanic to double check for vacuum leaks?


let me know if you need more help




Paul M.

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