Fuel Rail/System pressure is too low, PCM sets P0087.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Plausibility Monitoring | 1. Poor Connector Connection 2. Clogged Fuel Filtter 3. Restricted Fuel Supply Line 4. Fuel Leakage 5. Defected Fuel Pressure Regulator 6. Defected Fuel Rail Pressure Sensor 7. Defected PCM | |
Enable Condition | Case 1, 2 |
•
No additional warm up fueling
•
Full load not active
•
Catalyst purge not active
•
Lamda control active
•
Catalyst overheating prevention not active
•
Leak detection not active
•
Catalyst heating finished
•
Engine speed higher than 512 RPM and lower than 4000 RPM
•
Mass fuel flow higher than 0.01 g/rev and lower than 0.14 g/rev
•
15 sec. after engine start
•
Volume fuel flow less than 7.6 to 102 L/h versus engine speed
•
Canister load lower than 0.5
•
No relevant DTC present | |
Case 3 |
•
5 sec. after engine start
•
ECT higher than 14℉(-10℃) and lower than 91.4℉(33℃) at engine start(Fuel pressure setpoint for catalyst heating is applied)
•
Volume fuel flow less than 7.6 to 102 L/h versus engine speed
•
Engine speed higher than 512 RPM
•
No relevant DTC present | ||
Threshold Value | Case 1 |
•
Lambda Controller including adaptive value higher than -15% and lower than 15%
•
Fuel pressure controller higher than 290psi(20bar) | |
Case 2 |
•
Lambda Controller including adaptive value higher than -15% and lower than 15%
•
Fuel pressure controller higher than 145psi(10bar)
•
Deviation of fuel pressure setpoint higher than 217.5psi(15bar) | ||
Case 3 |
•
Deviation of fuel pressure setpoint higher than 217.5psi(15bar) | ||
Diagnostic Time |
•
8 sec. | ||
MIL ON Condition |
•
2 Driving Cycle | ||
