» » »

Ford Q&A

Ask Your Question

1999 Ford F-150 Question: check engine light on

 

Question

joe6pack, 4.2L V6, Hewitt, TX, February 26, 2012, 14:08
 Rookie

code p171 bank 1 too lean. what should i do to fix it?

1 Answer
Flag This
  • Answer #1

    February 26, 2012, 18:24
     Technician

    The 2 things i would do first is have someone check for vacuum leaks
    with a smoke machine.
    And also have the MAP sensor cleaned.
    Reset the engine light and test drive it.

    Sometime a collapsed vacuum hose will not show up with a smoke machine
    because the smoke pushes pressure in the hose.
    Have someone check all hose with a good bright flash or drop light.

    Reply
    Flag This