2002 Mercury Mountaineer code p171&codep172

2002 MERCURY MOUNTAINEER
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DORIS G HICKS
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  • 2 POSTS
Engine Performance problem
2002 Mercury Mountaineer V8 All Wheel Drive Automatic

my suv is cutting off mostly at stop light what does these codes mean?
Nov 20, 2009 at 11:33 PM
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RACEFAN966
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  • 5,029 POSTS
These codes are as such. P0171 and P0172 is lean condition could be an O2 sensor or fuel injection or vacuum leak or? Now what I would like you to do first is unplug the Mass Air Flow Sensor and see if it idles better and dont stall. Get back to me with what you find here.
Nov 21, 2009 at 1:01 AM
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