Conditions for Running the DTC
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
P0685, P0686, and P0687
- The battery voltage is between 10-18 volts.
- The ignition is OFF.
- The PT relay has been commanded ON and OFF.
- The DTCs run continuously once the above condition is met.
P0689 and P0690
- The ignition is ON.
- The PT relay has been commanded ON.
- The DTCs runs continuously once the above condition is met.