ECM/PCM 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 | Case 1 |
•
High pressure sensor output check | 1. Poor connection 2. FPS |
Case 2 |
•
Rationality check negative offset | ||
Case 3 |
•
Rationality check positive offset | ||
Enable Conditions | Case 1 |
•
Sensor Output Volatage > 4.9V
•
Sensor Output Volatage < 0.20V | |
Case 2 |
•
Multiplicative Long Term FT < 0.8%
•
Adaptive Long Term FT < -6.0%
•
IG ON | ||
Case 3 |
•
Multiplicative Long Term FT > 1.2
•
Adaptive Long Term FT > 6.0%
•
IG ON | ||
Threshold Value | Case 1 |
•
Sensor Output Voltage Jump time < 0.06 sec. | |
Case 2 |
•
Relative pressure < 0.13MPa | ||
Case 3 |
•
Relative pressure > 1.3MPa | ||
Diagnosis Time |
•
- | ||
MIL ON Condition |
•
2 trips | ||
