Theory of Operation
WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
This algorithm monitors the control system to ensure that the fueling output is consistent based on the operating conditions. The Engine Control Module (PCM) will light the ETC lamp immediately after the diagnostic runs and fails. During this time the customer may experience an engine derate or engine running rough. The PCM will turn off the ETC lamp once the diagnostic passes in one drive cycle.