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Re: Slow 02 response 2013 Silverado 5.3 4X4
Posted to Technical Discussion Forum on 1/22/2020 1 Reply

Both banks, pre-catalyst sensors were replaced? I have never had issue with a Denso A/F nor O2 sensor.

Most likely they forgot or didn't know about performing the oxygen sensor heater resistance relearn any time a new sensor (even OE) is installed. I forgot ... Login to read more.

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