HI there
This code is for a problem with the heater circuit on the bank 1 sensor 2. This is the sensor AFTER the converter on bank 1. If you used a direct fit sensor, the wiring must be tested.
P0054 CHEVROLET - HO2S Heater Resistance Bank 1 Sensor 2 Read more: https://www.autocodes.com/p0054_chevrolet.html
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