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  1. Re: Installed Champion oem spark plugs and check engine light came on

    Looking at that pic ... I would probably be swap in a new thermostat.

    ... but its always worthwhile considering the temp sensor is faulty ... as its not an unknown issue.

    Also ... if the gauge...
  2. Re: Installed Champion oem spark plugs and check engine light came on

    Good ground connections are important.

    PO420 Catalytic Converter Efficiency - Catalyst 1/1 efficiency below required level.

    Be aware that the cat will only be faulty ... IF the O2 sensor is...
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