P1186 is set when rail press. is lower than target rail press. by 500~150bar for more than 1.0 sec. in condition that rail press. is controlled by Fuel pressure regulator valve. This code is due to less than intended fuel supply to common rail or excessive return of fuel supplied to common rail or short to low voltage line in fuel press. sensor.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Signal monitoring | 1. RPS signal circuit short to ground 2. FPRV stuck | |
Enable Conditions |
•
Engine "ON" | ||
Threshold Value |
•
Rear value of fuel rail pressure is less than target value or limited value. | ||
Fail Safe | Fuel Cut |
•
YES | |
EGR Off |
•
NO | ||
Fuel Limit |
•
NO | ||
Check Lamp |
•
YES | ||
