P0302 , P0135, P0420 I should to mechanic and he told me spark plug is burnt out and oil is into engine he changed spark plug and gasket ,but i have to give accelerator hard sometimes
P0420 Catalyst System, P0302 Code - Cylinder #2 Misfire and P0135 is the oxygen Sensor. https://www.youtube.com/watch?v=yZsLzPc0V7U you will get bad acceleration with the all of these codes. I would change the sensor and Catalytic converter.
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