to clear stored codes,
pull 15amp EFI main fuse for 30secs. key off.
if it still lights, there's still an issue or the ecu is in question.
OBD2-should have two o2 sensors. b4 and after the cat.
it should also be noted that codes pointing to sensors, do not necessarily mean a sensor itself is bad. sensors should be tested. checked good, then the environment or components it monitors should be questioned.
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