Check engine light

[austins_mom]

I have a 2002 Sport Trac and the other day my check engine light came on. My husband took it to AutoZone and they hooked it up the the OBD, and it came up code 0171, bank 1, system lean. My husband said that most likely we needed a new oxygen sensor, but I wanted other opinions as well. So what do you think?

 

[BrooklynBay]

Welcome to this forum! It could be a vacuum leak, or possibly the intake manifold needs the 00M12 intake gasket kit. Check # 51 in my list of useful threads for more information: http://www.explorerforum.com/forums/showthread.php?t=177975.