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  1. EGR Valve & Components (P0401) code and fix by cleaning EGR components

    Generation 2 Volt (2016-2020)
    2016 Premier, 63,000 miles - error code (p0401) insufficient airflow detected. Two months ago my check engine light came on and i received an on-star notification of issues with exhaust system. I was in the midst of a 1600 mile trip using gas only. Once i returned home, i cleared the codes...