Error codes: P0420 AND P0446 1996 Oldsmobile Bravada 4.3 liter. Error code: P0420 and will not pass emissions. Also code: P0446, I realize that the P0420 may be a 02 sensor, but I am looking for ...
Code P0420 on 2001 Olds Bravada Check engine light comes on, but unable to locate all the sensors to check for open or closed circuit. Inefficient Catalytic Converter(s) Defective Front or Rear Oxygen
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