P1186 is set when rail pressure is 200bar lower than target value and the fuel amount from high pressure is close to minimum limit value (-410 ㎣/s) in condition that rail pressure is controlled by fuel metering unit (P-PRV). Check whether less amount of fuel is delivered than target amount of fuel controlled by ECM, too much return amount delivered to common rail or stuck resulting from low voltage of RPS.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy |
•
Voltage monitoring | 1. Fuel pressure too low 2. P-PRV (Close stuck) 3. PRV (Open stuck) 4. RPS (Output fixed at low voltage line) | ||
Enable Conditions |
•
Engine running (P-PRV operating range) | |||
Threshold Value |
•
Real rail pressure is 200bar lower than target value and the fuel amount from high pressure is close to minimum limit value (-410 ㎣/s). | |||
Diagnostic Time |
•
1.0 sec. | |||
Fail Safe | Fuel cut | NO |
•
- | |
EGR Off | NO | |||
Fuel Limit | YES | |||
Check Lamp | ON | |||
