2006 HUMMER H3

  • Tiny
  • glyle
  • 2006 Hummer H3

Computer problem
2006 Hummer H3 6 cyl Four Wheel Drive Automatic 72000 miles

PO 171 too lean This is what a guy at auto zone said was wrong with my vehicle. Exactly what does that mean?

Tuesday, March 2nd, 2010 AT 5:53 PM

1 Answer

  • Tiny
  • factoryjack
  • Expert
  • 4,263 posts

It means there is more air than fuel as recognized by the oxygen sensor. Have you had any repairs, or maintenance performed, that would have included the air intake disconnected. Often times, the breather hose that connects to the cam cover, under the airbox, is disconnected at one end. You will need to loosen the clamp at the throttle body, and the two 10mm bolts that hold it down, to check this hose. It is not visible otherwise.

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Saturday, March 6th, 2010 AT 1:06 AM

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