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  1. Is there a list of optimal figures for OBD scanner results? Such as fuel trim, O2 etc

    Care, Maintenance & Service - Chevy Volt
    Looking for optimal fuel trim and oxygen etc. to try to understand if my engine is running rich. Had a recent misfire and my plugs have carbon buildup. It would be helpful to have a compiled list of target OBD sensor figures for owners to compare their car's statistics to how it should...