Conditions for Running the DTC

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

P0657

DTC P0657 is not set.
Battery voltage is between 9-18 V.
Engine speed is greater than 200 RPM.
HSD1 is commanded on.

P0658

DTC P0658 is not set.
Battery voltage is between 9-18 V.
Engine speed is greater than 200 RPM.
HSD1 is commanded on.