Conditions for Running the DTC
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 ignition is ON.
- The system voltage is between 9-18 volts.
- DTCs P0443 and P0449 run continuously when the above conditions are met.