Dear Friends. I have vitz 2010, 1000 Cc. I m its first user. I have driven it 62K Km. Last mont, it got engine check light. After scanning, it was "Catalytic System Efficiency below threshold (p0420)" error. Mechanic advised me to clean catalytic converter. I got it clean. After refitting catalytic converter, I just drove 2 km and again check light was on. Again after scanning, it was a new trouble code. It was "A/F Sensor response slow " error. I cleaned the sensor twice but error is still there.
Anyone guide me how to get rid of this problem permanently?