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Theory Of Operation

WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. 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.

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