ERROR CODES ON YOUR CAR TIPS. Two Common ERROR CODES for Cars & Trucks 02 sensor = Emissions Issue - An 02 sensor is an oxygen sensor that monitors how much oxygen is in the exhaust stream. The sensor informs the engine computer to adjust the air-to-fuel ratio, thus keeping the catalytic converter running in an efficient manner. Cat: catalytic Converter = Emissions Issue - Catalytic Converters came about in the 1975 era and are utilized to reduce the type of emissions cars produce from toxic fumes to 98% non-toxic fumes. (Some vehicles require a dual converter system vs. single and can be costly to repair. |