DTC P1397: Notes

DTC P1397 (MZI-3.5) DETECTION CONDITION AND POSSIBLE CAUSES

DTC P1397	System voltage out of self-test range
DETECTION CONDITION	This DTC indicates that the 12-volt system voltage is too high or too low during the KOEO or KOER self-test. It sets if the system voltage falls below or exceeds the calibrated threshold at any time during the KOEO or KOER self-test.
POSSIBLE CAUSE	Battery or charging system concern.