DTC P0603:00 [Aw6A-El]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION AND POSSIBLE CAUSE

DTC P0603:00	EEPROM malfunction
DETECTION CONDITION	Different numeric values for EEPROM and RAM (in TCM) are detected. Diagnostic support note: The MIL illuminates if the TCM detects the above malfunction condition during the first drive cycle. The AT warning light illuminates if the TCM detects the above malfunction condition during the first drive cycle. PENDING CODE is not available. FREEZE FRAME DATA is available. The DTC is stored in the TCM memory.
POSSIBLE CAUSE	TCM malfunction

DTC P0603:00

EEPROM malfunction

DETECTION CONDITION

Different numeric values for EEPROM and RAM (in TCM) are detected.

Diagnostic support note:

The MIL illuminates if the TCM detects the above malfunction condition during the first drive cycle.
The AT warning light illuminates if the TCM detects the above malfunction condition during the first drive cycle.
PENDING CODE is not available.
FREEZE FRAME DATA is available.
The DTC is stored in the TCM memory.

POSSIBLE CAUSE

TCM malfunction