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catalytic converter smog check california

  1. OceanSide760
    Thread

    (need help!) 360 Modena not "Emission READY" for Smog Check & CEL: P0431 code

    My 2003 360 not "Emission READY" for Smog Check & throws CEL for P0431 [reads: generic, Warm Up Catalyst Efficiency Below Threshold (Bank 1)]...
    Thread by: OceanSide760, Dec 6, 2020, 3 replies, in forum: California (Southern)
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