If rail pressure exceeds threshold value by 200 bar or is higher than maximum pressure(1999bar) while rail pressure is controlled by FPCV, ECM sets DTC P118500. This fault might be caused by too much fuel supply to common rail or faulty fuel return line of common rail or faulty RPS.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy |
•
Signal monitoring | 1. Poor connector connection 2. Stuck closed FPCV 3. Stuck opened FPCV 4. Faulty RPS | ||
Enable Condition |
•
Engine running | |||
Threshold Value | Case 1 |
•
Target pressure is lower than actual rail pressure | ||
Case 2 |
•
Rail pressure is higher than maximum pressure (1999bar) | |||
Detecting Time | Case 1 |
•
2 sec. | ||
Case 2 |
•
300 msec. | |||
Fail Safe | MIL |
•
On | ||
Torque Limit |
•
Yes | |||
LNT Regeneration OFF |
•
Yes (Case 1) | |||
