2006 Hummer H3

2006 HUMMER H3
72,000 MILES • 6 CYL • 4WD • AUTOMATIC
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GLYLE
  • MEMBER
  • 1 POST
PO 171 too lean This is what a guy at auto zone said was wrong with my vehicle. Exactly what does that mean?
Mar 2, 2010 at 5:53 PM
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FACTORYJACK
  • CAR REPAIR CONTRIBUTOR
  • 4,159 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.
Mar 6, 2010 at 1:06 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.