P0088 is set if rail pressure is above the upper limit value. This code is due to 1) fuel more than target value supplied to common rail or 2) poor return of fuel supplied to common rail or 3) short to high voltage line in rail press. sensor.
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 (fixed at low voltage) | ||
Enable Conditions |
•
Engine running (PRV operating range) | |||
Threshold Value |
•
Real value of rail pressure is approx. 250bar higher than target value. | |||
Diagnostic Time |
•
2.0 sec. | |||
Fail Safe | Fuel cut | NO |
•
- | |
EGR Off | NO | |||
Fuel Limit | YES | |||
Check Lamp | ON | |||
