Conditions for Running the DTC

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

P0685, P0686, P0687

Ignition Voltage = Greater than 11 V

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

P0689

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

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

P0690

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