2005 Toyota Corolla S 1.8 code PO420

Question

Now I'm receiving a code PO420 on my 2005 Toyota Corolla ?

Answer 1

HI there,

This indicates you need to replace the catalytic converter located between the two O2 sensors. This code can also be the result of a bad rear O2 sensor. A scan tool that can read the live data is required for that.