Engine Controls - DTC P0300 Resets After Reprogramming

SOURCE: Mitsubishi Tech Talk Article April/May 2005

TITLE: DTC P0300 Resetting After Reprogramming

APPLIES TO: 2003-04 Lancer Evolution

SERVICE TIP:

There have been some reports of DTC P0300 being reset after the PCM has been reprogrammed. Be sure that you reflashed the PCM with the latest software (database N05021, see TSB-05-13-003). Also verify that the ROM ID is current (964111 for 2004 models; 941715 for 2003 models).