Fuel Rail Pressure Sensor Checks
FUEL RAIL PRESSURE (FRP) SENSOR CIRCUIT CHECK
| DTCs | P0192 - Fuel Rail Pressure Sensor A Circuit Low Input P0193 - Fuel Rail Pressure Sensor A Circuit High Input |
| Monitor Execution | Continuous |
| Monitor Sequence | None |
| Sensors OK | Sensor Supply 1 OK (P06A6/P0642) |
| Typical Monitoring Duration | 0.5 sec |
TYPICAL FUEL RAIL PRESSURE SENSOR CIRCUIT CHECK MALFUNCTION THRESHOLDS
| FRP voltage < 0.13 V, or > 3.17 V |
FUEL RAIL PRESSURE (FRP) SENSOR CIRCUIT INTERMITTENT CHECK
| DTCs | P0194 - Fuel Rail Pressure Sensor Circuit Intermittent/Erratic (Bank 1) |
| Monitor Execution | Continuous |
| Monitor Sequence | None |
| Sensors OK | Sensor Supply Voltage 1 OK (P06A6) FRP (P0192, P0193) |
| Typical Monitoring Duration | 4 sec |
TYPICAL FUEL RAIL PRESSURE SENSOR CIRCUIT INTERMITTENT MALFUNCTION THRESHOLDS
| FRP gradient > 60 MPa |
FUEL RAIL PRESSURE (FRP) RATIONALITY CHECK OPERATION
| DTCs | P0191 - Fuel Rail Pressure Sensor "A" Circuit Range/Performance |
| Monitor Execution | Immediately Prior to Crank and After Key-off (Key-off only for 6.7L products) |
| Monitor Sequence | None |
| Sensors OK | Sensor Supply Voltage 1 OK (P06A6), FRP OK (P0192, P0193), CKP OK (P0335, P0336), CMP OK (P0016, P0341, P0342, P0343) |
| Typical Monitoring Duration | 0.5 sec |
TYPICAL FUEL RAIL PRESSURE RATIONALITY CHECK ENTRY CONDITIONS
| Entry Conditions | Minimum | Maximum |
| Pre-crank: engine coolant temperature (6.7L) | - 7 deg C | |
| Pre-crank: time engine off (6.7L) | 600 sec | |
| Pre-crank: change in engine coolant temperature from previous key-off (3.2L) | 35 deg C | |
| After key-off: fuel temperature | - 40 deg C | |
| After key-off: time since key off | 12 sec |
TYPICAL FUEL RAIL PRESSURE RATIONALITY MALFUNCTION THRESHOLDS
| FRP voltage < 0.251 V (-40 bar) or > 0.384 V (68 bar). |