SOME VEHICLE ENGINES MAY EXHIBIT A ROUGH IDLE AND / OR MALFUNCTION INDICATOR LAMP (MIL) LIGHT ON CONDITION UPON INITIAL START-UP AFTER A COLD SOAK WHEN TEMPERATURES ARE BELOW 50 DEGREES F (10 DEGREES C). THIS BULLETIN INVOLVES SELECTIVELY ERASING AND REPROGRAMMING THE POWERTRAIN CONTROL MODULE (PCM) WITH NEW SOFTWARE. *TT