Here we are replacing our (bank 1 sensor 2) downstream O2 sensor which has prevented the PO420 code from returning. The code would trigger within 5 minutes of the car idling and although the car still ran great before replacing the sensor it is nice to no longer have that CEL.
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Did you need to disconnect the battery first?
Great video.
What if you getting a p0420 & p0430 code Cadillac STS 2006 do i still start with down stream oxygen sensors ???
please make more i got 2011 cts same issue but would love to learn more
For. P0420 code bank one. Did you just change the one Sensor or both of them on the upstream. Thx
po420 no issues at all but after i cleared the code it came back on. $48 part, might as well changed it. thank you for your video, it helped me out.
Does “below threshold bank 1” mean sensor 1 or 2?
What symptoms were you experiencing with your car before you replaced it?
Do I have to replace all the o2 sensors