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Q:

OXYGEN SENSORS-I AM TOLD I HAVE 3 O2 SENSORS ON MY PICKUP. I JUST HAD THE HEATED on 2004 Chevrolet Silverado 1500

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SENSOR I BELIEVE POSITION 2 REPLACED. CAN YOU TELL ME IF I DO ONLY HAVE 2 MORE TO REPLACE, DOWNSTREAM OR UPSTREAM AND ARE HEATED AS WELL?
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you could have 4 total hard to say all veh are diff and yes they are all heated now days. why are you repl all? do you have eng codes that indicated they are bad?
I had an engine code that the position 2 sensor was bad and I think it was the parts house told me I would want to change all of them as the new one could foul out the others. Is that true? Once the bad sensor was changed out the engine code and light went away.
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