Oxygen Sensor Trouble Codes

By Harvey Halabookie
November 11, 2008 in 1999-2013 Silverado 1500 & Sierra 1500

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Harvey Halabookie

Posted November 11, 2008

I just changed all four oxygen sensors last week. I used new Bosch units. The truck ran great until yesterday when the check engine light came on. I got the codes for P0171 and P0174. I reset them and now it seems OK again.

Is there a process to re-learn or re-set the new sensors?

Do I need to remove the Hypertech programming before I do anything?

Thanks.

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