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2006 Hummer H3, my engine light came on and it was reading both sensors

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2006 Hummer H3. my engine light came on and it was reading both sensors. I changed both upstream and down, but the light still is on, why?

Vehicle: 2006 Hummer H3

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Check the fuses, if all the fuses are OK you may have an open wire or bad PCM.

P0030 HUMMER - HO2S Heater Control Circuit Bank 1 Sensor 1

Read more: https://www.autocodes.com/p0030_hummer.html

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