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O2 Sensors


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Hello everyone,

I have a 2001 IS300 and this weekend the CEL came on and the OBD tester indicates that my both O2 sensors on Bank 1 are bad. My question is if this is normal for both sensors go bad at the same time or something else other than the sensors ?? I sure don't want to spend 2-3 hundred bucks for new sensors that I don't need.

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