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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 144 (Automatic Transmission - 6L50/6L80/6L90 - DTC P0218 To DTC P0977) >> DTC P0601, P0602, P0603, P0604, or P1621 >> DTC Descriptors

DTC Descriptors

WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Cadillac Escalade EXT, 2007 Cadillac Escalade ESV, and 2007 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0601

Transmission Control Module (TCM) Read Only Memory (ROM)

DTC P0602

Transmission Control Module (TCM) Not Programmed

DTC P0603

Transmission Control Module (TCM) Long Term Memory Reset

DTC P0604

Transmission Control Module (TCM) Random Access Memory (RAM)

DTC P1621

Transmission Control Module (TCM) Long Term Memory Performance

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