Theory Of Operation
WARNING: This page is about a different car, the 2010 Dodge Avenger and 2010 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
The Transmission Control Module (TCM) monitors the operation of all shift and pressure control solenoids. If a fault is detected during testing, the transmission line pressure will be raised to maximum line pressure to avoid damage to the transmission. It takes two consecutive one trip failures to set this DTC and illuminate the MIL.