Diagnostic Aids
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
- DTC P0601 detects a non-volatile memory write error (ROM).
- DTC P0604 detects the wrong copy of non-volatile memory in RAM or a RAM read/write failure.
- DTC P062F detects a corruption of the EPROM/Flash memory.
- Low voltage or a momentary loss of power or ground to the transfer case control module may cause a DTC to set. Verify the following:
- The battery cables are clean and tight, and the battery is fully charged. Refer to Battery Inspection/Test .
- The transfer case control module ground circuits do not have an open or high resistance.
- The transfer case control module power circuits do not have an open, short to ground, or high resistance.