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  1. 174 Error code - air/fuel mix too lean.

    3rd Generation Chrysler Minivans: 1996-2000
    Had the van to the service guys for the check engine light, and this is what it came back as: 174: The oxygen sensor is saying that the system air/fuel mix is far too lean (too much fuel is being added as a correction). They couldn't find anything other than fuel filler neck being corroded...
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