Conditions for Running the DTC

WARNING: This page is about a different car, the 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

P0685 and P0686

The battery voltage is between 10.5-18 volts.
The ignition is ON.
The relay has been commanded ON.
These DTCs run continuously when the above conditions have been met.

P0687, P0689, and P0690

The battery voltage is between 10.5-18 volts.
The ignition is OFF.
The powertrain relay has been commanded OFF.
These DTCs run continuously when the above conditions have been met.