Conditions for Setting the DTC: P0054
WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- The ECM detects that the affected HO2S heater low control circuit is not within a specified resistance range at engine start-up.
- DTC P0054 sets within one second when the above condition is met.