What is your question?
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What is your question?
Code called for upstream oxygen sensor. I have replaced both as the car has 135,000 miles.

2 Replies
What brand sensors did you use? Some aftermarket's just dont work! Possible citcuit problem as well.
The upstream sensor was an after market, and the downstream was a Bostch.
DENSO, NTK/NGK. Is what i have the best luck with on Toyota! No luck with Bosh on anything!
does the live data show catts are ok and what about o2 readings