Some 2013 Ford Mustangs built on or before 11/30/2012 and equipped with a 5.0L engine and manual transmission may exhibit a check engine light accompanied by any combination of DTCs P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and/or P0308 stored in continuous memory only. Additionally, there will be no apparent drivability symptoms present and no other DTCs.
Using IDS, perform self-test on the PCM to check for both continuous memory DTCs and KOER (key-on engine running) DTCs. If any DTCs P0300-P0308 are present in KOER and/or a drivability concern such as cylinder misfire are present, this bulletin does not apply. Refer to powertrain control/emissions diagnostics in the manual for normal diagnostics.
If any DTCs P0300-P0308 are present in continuous memory and there is no discernible drivability concerns, verify if misfire conditions were at rpms between 3,500-4,200 rpm, with a load of less than 0.25 using IDS OBD II freeze frame data and/or use IDS datalogger and view MFF_RPM, and MFF_LOAD PIDS (datalogger>modules>PCM).
If these conditions were met, reprogram the PCM to the latest calibration using IDS release 82.02 and higher. If these conditions were not met, using IDS, perform the Misfire Monitor Neutral Correction procedure per the service manual.