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1998 Mercury Mystique OBD Code P1131

Tiny
JR47
  • MEMBER
  • 1998 MERCURY MYSTIQUE
  • 2.0L
  • 4 CYL
  • AUTOMATIC
  • 90,342 MILES
Any one have an idea on what I should check first before I buy any parts for it. I heard it could be the fuel pump or the filter or possible just a bad O2 sensor or a vacuum leak that's causing it.
Friday, August 28th, 2015 AT 9:54 PM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Check for vacuum leaks around the manifold first, often a o2 sensor code is not a faulty sensor but if you can get a live data read of the sensor if it is not changing voltage it will probably be faulty.
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Saturday, August 29th, 2015 AT 1:57 AM

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