Fuel Rail/System pressure is too high, PCM sets P0088.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Plausibility Monitoring | 1. Poor Connector Connection 2. Short to Battery in Fuel Rail Pressure Sensor Signal Circuit 3. Restricted Fuel Return Line 4. Defected Fuel Pressure Regulator 5. Defected Fuel Rail Pressure Sensor 6. Defected PCM | |
Enable Condition | Case 1 |
•
Engine speed higher than 512 RPM | |
Case 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 |
•
Filtered Fuel Pressure higher than 3176psi(219bar) | |
Case 2 |
•
Lambda Controller including adaptive value higher than -15% and lower than 15%
•
Minimum injection time not active
•
Fuel pressure controller lower than -217.5psi(-15bar) | ||
Case 3 |
•
Deviation of fuel pressure setpoint higher than -217.5psi(-15bar) | ||
Diagnostic Time | Case 1 |
•
2 sec. | |
Case 2, 3 |
•
8 sec. | ||
MIL ON Condition |
•
2 Driving Cycle | ||
