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Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Engine Controls - Self Diagnostics - 4.7L) >> Diagnostic Tests >> DTC P1603: Pcm Internal Dual-Port Ram Communication, DTC P1604: Pcm Internal Dual-Port Ram Read/Write Integrity Failure Or DTC P1607: Pcm Internal Shutdown Timer Rationality >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
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