When Monitored

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.

This diagnostic runs continuously when the following conditions are met:

No Input or Output Speed Sensor supply voltage Diagnostic Trouble Codes (DTCs) set.
No Speed Sensor signal DTCs set.
No Engine Speed or Wheel Speed Controller Area Network (CAN) signal DTCs set.