I replaced both downstream O2 sensors. The p0420 code went away. The p0430 (passenger side downstream) code had gone momentarily and has come back.
I know cats are good. Whats strange is that the O2 sensor output is zero. I am using Denso and not Toyota.
Any tips?
I know cats are good. Whats strange is that the O2 sensor output is zero. I am using Denso and not Toyota.
Any tips?