2003 Ford Focus ODB-II Trouble Code P0191

2003 FORD FOCUS
90,000 MILES • 4 CYL • FWD • AUTOMATIC
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DKEITH
  • MEMBER
  • 1 POST
What is the most probable cause for this failure code.
Aug 20, 2008 at 9:34 AM
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BMRFIXIT
  • ✓ASE Certified Mechanic
  • 19,053 POSTS
  • ASE Certified Mechanic
Possible cause and all need to be checked :

High fuel pressure
Low fuel pressure
excessive resistance in circuit
faulty FRP sensor
low or no fuel
Aug 26, 2008 at 6:08 AM
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