Error code

Tiny
GBROOKS
  • MEMBER
  • 1998 MERCURY MYSTIQUE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 156,000 MILES
On a 1998 Mercury Mystique what is code 1131does not seam to have a vacuum leak, what is bank 1
Saturday, February 19th, 2011 AT 9:32 PM

1 Reply

Tiny
PROTECH1980
  • MEMBER
  • 901 POSTS
P1131 means the bank 1 Oxeygen sensor indicates your engine is running lean (not enough fuel). Bank 1 is the cylinder head in which #1 cylinder is in, in your case you only have one bank being a 4 cyl, in the case of a v6 or v8 these engines have two banks, bank1 and bank2. Any how one of the most common problems with this car is a dirty mass air flow sensor or vaccum leaks, but as stated you believe it doesnt have a leak, I would get some approved MAF cleaner and clean it, clear codes and go from there.
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Sunday, February 20th, 2011 AT 1:05 AM

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