1998 Mercury Mystique OBD Code P1131

1998 MERCURY MYSTIQUE
90,342 MILES • 2.0L • 4 CYL • AUTOMATIC
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JR47
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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.
Aug 28, 2015 at 9:54 PM
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MHPAUTOS
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  • ASE Certified Mechanic
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.
Aug 29, 2015 at 1:57 AM
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