P1185 is set when rail press. is higher than target rail press. by 200~350bar in condition that rail press. is controlled by Fuel pressure regulator valve or rail press. exceeds maximum limiting value. This code is due to more than intended fuel supply to common rail or poor return of fuel supplied to common rail or short to high voltage line in fuel press. sensor.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Signal monitoring | 1. RPS signal circuit short to battery 2. FPRV stuck | |
Enable Conditions |
•
Engine "ON" | ||
Threshold Value |
•
Rear value of fuel rail pressure is greater than target value or limited value. | ||
Fail Safe | Fuel Cut |
•
YES | |
EGR Off |
•
NO | ||
Fuel Limit |
•
NO | ||
Check Lamp |
•
YES | ||
