Default Action

WARNING: This page is about a different car, the 2019 RAM 3500 HD and 2019 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

The DTC state will change to Stored when the Auto Headlamps Signal circuit voltage is above 0.3 volt for more than 2.5 seconds.
The HVAC Module will transmit a Signal Not Available (SNA) message on the Controller Area Network (CAN) indicating that the Auto Headlamps (Twilight/Ambient Light) signal is not available.