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360 pre cat catalytic converter smog check

  1. OceanSide760
    Thread

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

    I am in California. My 2003 360 not "Emission READY" for Smog Check & throws CEL for P0431 [reads: generic, Warm Up Catalyst Efficiency Below...
    Thread by: OceanSide760, Dec 6, 2020, 0 replies, in forum: 360/430
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