code PO174

1917 FORD EXPLORER
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PATRICKAHLA
  • MEMBER
  • 4 POSTS
Ford Explorer Sport 188,000 miles.4.0 engine.
I have a code PO174. System too lean(left cylinder bank)I have already replaced o2 sensors on both banks.So now I have no idea what to do.Could someone please help.

Thank you.
Jan 16, 2007 at 5:17 AM
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2CARPRO JACK
  • ✓Experienced Mechanic
  • 11,533 POSTS
If there are no vacuum leaks then its probably the Mass Airflow Meter. Ford ahd some problems with them.I would go to the dealer even if there is an aftermarket unit available
Jan 16, 2007 at 5:42 AM
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