Code 12 - System Normal
This DTC No. 12 is always displayed with the key "ON" and the engine not running and it only means that the engine is not running. This DTC No. 12 is not stored in memory.
NOTE:
If the signal DTC No. 12 only is displayed when the function key is operated after clearing the memory, it indicates that the ECM electrical circuits and self-diagnosis system are functioning properly.