Fuel Rail Pressure Controller Range Check
6.7L:
When fuel rail pressure is controlled by the Pressure Control Valve, the Pressure Control Valve signal needed to maintain rail control is compared to an expected value. An adaptation factor for the Pressure Control Valve is calculated from the difference between observed and expected control values. Inaccuracy in the Rail Pressure Sensor Signal Slope is a potential cause of inaccuracy in the needed Pressure Control Valve signal along with physical errors in the PCV itself. If the adaptation factor required for the Pressure Control Valve exceeds a minimum or maximum control limit, then a code is set for rail pressure slope out of acceptable range.
3.2L:
The system attempts to correct for production variation in the VCV by learning an adapted flow through the VCV.
| DTCs | P016D - Excessive Time To Enter Closed Loop Fuel Pressure Control P228E - Fuel Pressure Regulator 1 Exceeded Learning Limits - Too Low P228F - Fuel Pressure Regulator 1 Exceeded Learning Limits - Too High |
| Monitor Execution | Continuous |
| Monitor Sequence | None |
| Sensors OK (6.7L only) | Sensor Supply Voltage 1 (P06A6), FRP (P0192, P0193) |
| Typical Monitoring Duration | P016D - 30 sec (6.7L), P016D - 255 driving cycles (3.2L), P228E, P228F - 10 sec |
| Entry Condition | Minimum | Maximum |
| P016D (6.7L): | ||
| Requested rail pressure | 500 bar | 1200 bar |
| Fuel temperature | 40 deg C | |
| P016D (3.2L) | ||
| P228E, P228F: | ||
| Rail pressure set point | 500 bar | 1200 bar |
| Fuel Temperature | 40 deg C | |
| P016D (6.7L): If the system is within the adaptation operating conditions, but fails to learn a new adaptation factor after 300 seconds, this DTC is set. P016D (3.2L): If the system has not successfully learned an adaption value for the VCV after 255 driving cycles, a DTC is set. P228E, P228F: If the adaptation factor exceeds positive or negative thresholds which correspond to approximately a 20% deviation in the Rail Pressure Sensor slope, a DTC is set. |