1998 Mercury Mountaineer P1131 code

Tiny
AEATON
  • MEMBER
  • 1998 MERCURY MOUNTAINEER
  • V8
  • AWD
  • AUTOMATIC
  • 152,000 MILES
My check engine lights on and it gave a code p1131 fuel metering, I changed the gas cap for pressure but that didnt seem to work. Anyone know what it could be?
Thursday, January 29th, 2009 AT 8:25 PM

1 Reply

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
DTCs P1131 and P1151 indicate air/fuel ratio is correcting rich for an overly lean condition. DTCs P1132 and P1152 indicate air/fuel ratio is correcting lean for an overly rich condition. DTCs P1130 and P1150 indicate fuel system has reached maximum compensation and HO2S is not switching at the adaptive limits. Possible causes are:
à   Fuel system malfunction.
à   EGR system malfunction.
à   Air intake or vacuum system leak.
à   Engine oil level too high.
à   Incorrect cam timing.
à   Restricted air cleaner.
à   Faulty PCV system.
à   Excessive internal engine wear.
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Thursday, January 29th, 2009 AT 8:51 PM

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