Conditions for Running the DTC

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

P0685, P0686, P0687, P16A7

Ignition Voltage = Greater than 11 V

Frequency the DTC runs = Continuously - After the running conditions are met

P0689, P16AF

Ignition Voltage = Greater than 9 V
Engine Controls Ignition Relay Command = On

Frequency the DTC runs = Continuously - After the running conditions are met

P0690, P16B3

DTC P0685 = Not set
Engine Controls Ignition Relay Command = Off - For greater than 2 s

Frequency the DTC runs = Continuously - After the running conditions are met

P1682

Engine Controls Ignition Relay Command = On
Ignition Voltage = Greater than 5. 5 V

Frequency the DTC runs = Continuously - After the running conditions are met