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Q: Replaced both o2 sensors on 2003 Camry, but light comes back on. Any help? on 2003 Toyota Camry

Code called for upstream oxygen sensor. I have replaced both as the car has 135,000 miles.
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What brand sensors did you use? Some aftermarket's just dont work! Possible citcuit problem as well.
DENSO, NTK/NGK. Is what i have the best luck with on Toyota! No luck with Bosh on anything!
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