1998 Ford Taurus obd 11 scan is reading po133 & 1131

1998 FORD TAURUS
130,000 MILES • 6 CYL • FWD • AUTOMATIC
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TERRY62653
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  • 1 POST
why are o2s sending these two codes out
Aug 13, 2008 at 5:18 AM
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BMRFIXIT
  • CERTIFIED EXPERT
  • 19,053 POSTS
possibilities :

vacuum leak
check pcv valve

mass air flow sensor

O2 sensor and wiring
exhaust leak
Aug 13, 2008 at 5:58 AM