Trouble Code Erasure

A Diagnostic trouble code will be cleared from TCM memory if it has not reset for 40 warm-up cycles.
A warm-up cycle is defined by CARB as "sufficient vehicle operation such that the coolant temperature has risen by at least 40°F from engine starting and reaches a minimum temperature of 160°F."
The Malfunction Indicator Lamp (MIL) will turn off after 3 good trips, or when the DTC's are cleared from the TCM.