Fuel-Ratio Imbalance for Mustang
Some 2012-2014 Ford Mustang vehicles equipped with a 5.0L engine and automatic transmission may exhibit a Malfunction-Indicator-Lamp (MIL) on with Diagnostic Trouble Code (DTC) P219A (fuel-ratio imbalance for bank with No. 1 cylinder) and/or P219B (fuel-ratio imbalance for bank that does not include No. 1 cylinder stored in the PCM memory).
If one or both DTCs are present, reprogram the PCM to the latest calibration using IDS release 90.05 or higher.