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 monitor can detect a large leak located anywhere between the Turbocharger outlet and the Intake Manifold. The monitor compares the estimated EGR flow to the actual EGR flow. If the actual EGR flow is much less than the estimated EGR flow, the fault will set. If the CAC hose is leaking or disconnected, the Turbocharger can still have enough exhaust flow that the compressor will draw air through the MAF. Charge Flow will be low since the flow is not reaching the Intake Manifold. This will cause the fault to be set.