P0300 - 001 - Upper Limit Exceeded - Intermittent P0431 - 001 - Upper Limit Exceeded - MIL ONġ6684 - Random/Multiple Cylinder Misfire Detected P0421 - 001 - Upper Limit Exceeded - MIL ONġ6815 - Warm Up Catalyst Bank 2: Efficiency Below Threshold This probably won’t make sense but this was a problem and now the problem is gone.Īfter I purchased my car and had its first emissions test pass.ġ6805 - Warm Up Catalyst Bank 1: Efficiency Below Threshold
