ECM shows P0191 when the average value from fuel rail pressure sensor is out of range of threshold value. This code is for abnormal sensor.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Rationality check | 1. Poor connection 2. FPS |
Enable Conditions |
•
Low pressure pump is operating. | |
Threshold Value |
•
Average value of fuel rail is higher than 32 ㎫
•
Average value of fuel rail is lower than 0.3 ㎫ | |
Diagnostic Time |
•
0.6 sec. | |
MIL ON Condition |
•
2 driving cycle |
