Mechanics

MITSUBISHI MONTERO EMISSIONS PROBLEM

2001 Mitsubishi Montero • 128,000 miles

Mitsubishi montero limited 2001 w/ intermitent chck engine light giveng me P0431 code and the truck goes on for another 1,000 or so miles. Just passed emissions without problems, althought muffler/exhaust place advised me to change cat anto2 sens because otherwise it would not pass emissipns. Should I worry about code?
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Josesimon
February 21, 2013.



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