DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681 & P1683: Pcm Memory: Description

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

This diagnostic applies to internal microprocessor integrity conditions within the control module. This diagnostic also addresses if the control module is not programmed. The following DTCs are diagnosed in this DTC procedure:

DTC P0601: Control Module Read Only Memory (ROM).
DTC P0602: Control Module Not Programmed.
DTC P0603: Control Module Long Term Memory Reset.
DTC P0604: Control Module Random Access Memory (RAM).
DTC P0605: Control Module Programming Read Only Memory (ROM).
DTC P0606: Control Module Internal Performance.
DTC P0607: Control Module Performance.
DTC P1600: Control Module Long Term Memory Reset.
DTC P1621: Control Module Long Term Memory Performance.