Graphing the rear oxygen sensor voltage output while monitoring it under different driving conditions can give some insights as to how the converter is performing. Anytime the voltage is steady and at 450mlv or higher, this indicates good converter performance; if under any driving conditions, it...
Detailed information on the P0420 dtc trouble code. Includes why it happens and how to fix your car.
Updated title to "...P0420 test defeat..." instead of P0420 fix #11 Tideland Prius, Dec 20, 2023 Mendel Leisk and Pioneerscot like this. Pioneerscot Junior Member Joined: Aug 30, 2023 78 10 0 Location: Nevada Vehicle: 2008 Prius Model: Two Tombukt2 said: ↑ That looks li...