Some 2011-2014 Ford Mustangs equipped with a 5.0L engine and built on or before 5/1/2013 may exhibit a MIL on with any combination of DTCs P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 and/or P0316. There will be no other DTCs or drivability symptoms present.
Using IDS (integrated diagnostic system), perform a self test on the PCM to check for both key-on/engine off (KOEO) and key-on/engine running (KOER) DTCs. If any DTCs P0300-P0308 and/or P0316 are present in KOER and/or a drivability concern such as cylinder misfire are present, this bulletin does not apply.
If any DTCs P0300-P0308 and/or P0316 are present in KOEO and no drivability concerns are present, remove the crankshaft position sensor (CKP) and install an O-ring on the CKP sensor. The O-ring is available as P/N FOPZ-9229-A.
Using IDS, clear DTCs and perform Misfire Monitor Neutral Profile Correction.