What is a DTC P0054?

DTC P0054 is a diagnostic trouble code that indicates an issue with the heated oxygen sensor (HO2S) heater circuit in bank 2. Specifically, it often points to a malfunction in the heater element of the sensor or a wiring problem. This code can result in poor engine performance and increased emissions. Diagnosing the issue typically involves checking the sensor's electrical connections, the sensor itself, and related components.