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The Chevrolet Cavalier is a compact automobile produced from 1982 to 2005 by General Motors.

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oxygen sensor not communicatng

oxygen sensor not communicating code p140

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Thoroughly examine the wiring harness to the oxygen sensor connector and then the wires to the sensor for cuts, breaks, abrasions, rubbing, etc. and fix where appropriate. Also examine inside the oxygen sensor connector to make sure the pins are there and are not dirty/corroded. If this does not fix the engine code or there are no issues with the wire harness, I would replace the oxygen sensor. I don’t think they are overly expensive for your vehicle. $20-$80 on rockauto.com.

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thank you, i will try this, and let you know, thaks again

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