If my car's check engine light is on and the plug on the oxygen sensor is melted would the check engine light come on because of that?

If my car’s check engine light is on and the plug on the oxygen sensor is melted would the check engine light come on because of that?

Yes it could create high resistance, or a short on multiple wiresensors. Either one will set the MIL on.

Jim O’Neill – Chino Autotech Inc., Auto Club SoCal AAR

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