Hello, my vehicle is 2011 model 207 sw 1.6 I always get fuel from P / O, I bought fuel from Opet for 1 time. I set out to return home the next day, after 10 km, the exhaust emission system malfunction and the engine lamp on the screen turned on. I can come to my house. message. (car performance is low, especially in take off and acceleration) When I got home the next day, I was asked to come to the industry at 15 km 3 gears and 4 revolutions. The exhaust cu said come when the warning was lit, the mechanic said, `` Let the mechanic look. . I proceeded 3 thousand cycles on the road. When I went 20 km, the exhaust emission system malfunction and the engine lamp turned on. What should I do in this case? What should I do in this case? Catalytic Converter everyone says, without looking, is this the only reason?