OBD Operation Summary for 6.7L Diesel - MotorCraftService.com

Fuel Rail Pressure Sensor Range Check:When fuel rail pressure is controlled by the Pressure Control Valve, the Pressure Control Valve signal needed tomaintain rail control is compared to an expected value. An adaptation factor for the Pressure Control Valve iscalculated from the difference between observed and expected control values. Inaccuracy in the Rail PressureSensor Signal Slope is a potential cause of inaccuracy in the needed Pressure Control Valve signal alongwith physical errors in the PCV itself. If the adaptation factor required for the Pressure Control Valveexceeds a minimum or maximum control limit, then a code is set for rail pressure slope out of acceptablerange.Fuel Rail Pressure ( FRP ) Range Check Operation:DTCsMonitor ExecutionMonitor SequenceP016D - Excessive Time To Enter Closed Loop Fuel Pressure ControlP228E - Fuel Pressure Regulator 1 Exceeded Learning Limits - Too LowP228F - Fuel Pressure Regulator 1 Exceeded Learning Limits - Too HighContinuousNoneSensors OK Sensor Supply Voltage 1 (P06A6), FRP (P0192, P0193)Typical Monitoring DurationP016D – 30 sec, P228E, P228F - 10 secTypical Fuel Rail Pressure Range Check Entry Conditions:Entry condition Minimum MaximumP016D:Requested rail pressure 500 bar 1200 barChange in requested rail pressure30 secFuel temperature40 deg CP228E, P228F:Rail pressure set point 500 bar 1200 barFuel Temperature40 deg CTime since engine start30 secTypical Fuel Rail Pressure Range Check Malfunction Thresholds:P016D: If the system is within the adaptation operating conditions, but fails to learn a new adaptation factorafter 30 seconds, this DTC is set.P228E, P228F: If the adaptation factor exceeds positive or negative thresholds which correspond toapproximately a 20% deviation in the Rail Pressure Sensor slope, a DTC is set.FORD MOTOR COMPANY REVISION DATE: FEBRUARY 9, 2012 09.01.00.02-PAGE 23 OF 157