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I just replaced the upstream and down stream 02 sensors.
Vehicle: 2013, Checy, Silverado, 5.3

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Hi there,

There can be some other reasons for this code, such as; faulty fuel injectors and fuel pressure. Here is some more info for you.

P015B CHEVROLET - Oxygen Sensor Delayed Response Lean to Rich Bank 1 Sensor 1

 

 

Read more: https://www.autocodes.com/p015b_chevrolet.html 

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