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2000 Ford Explorer codes P0171 and P0174

Tiny
FLIKK FAMILY
  • MEMBER
  • 2000 FORD EXPLORER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 124,000 MILES
I HAVE CHANGED O2 SENSORS, SPARK PLUGS TWICE, SPARK PLUG WIRES TWICE, AND HAD 4 MECHANICS TRY TO FIX IT. IT WILL GO OFF FOR ABOUT 2 DAYS AND THEN COME RIGHT BACK WHAT CAN I DO?
Friday, May 16th, 2008 AT 2:37 AM

1 Reply

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
Your problem is either a leaking intake manifold gasket or a faulty mass air flow sensor. Unless you have a scan tool that can watch o2 sensor voltage when cold to determine if thats when its running lean then replace mass air flow sensor and if the light comes back on then you know its the lower intake manifold gaskets are worn
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Friday, May 16th, 2008 AT 6:33 AM

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