2010 Porsche Cayenne S (9PA) V8-4.8L A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 65
Fuel high-pressure quantity
NOTE:
- Faults in the fuel high-pressure injection area are often caused by defects in the predelivery circuit (fuel low-pressure).
- Therefore, if there are problems. In the fuel high-pressure injection area, the predelivery circuit must be checked first.
- Diagnosis detects a deviation between setpoint and actual values in fuel high-pressure quantity control.
Diagnostic conditions
- Battery positive voltage > 9 V
- Engine speed between 450 rpm and 4000 rpm
- Engine temperature - 10 锟斤拷C ...+ 100 锟斤拷C (50 锟斤拷F ... 212 锟斤拷F)
- Drive with different load and speed ranges
Possible fault causes
- Predelivery quantity or pressure in fuel low-pressure circuit too low
- Quantity control valve faulty (in fuel high-pressure pump)
- Fuel high-pressure pump faulty
P1025
P1025
Diagnosis information - DME V8 DFI
Fuel high-pressure control - teaching
NOTE:
- Faults in the fuel high-pressure injection area are often caused by defects in the predelivery circuit (fuel low-pressure).
- Therefore, if there are problems. In the fuel high-pressure injection area, the predelivery circuit must be checked first.
Diagnostic conditions
- Battery positive voltage > 9 V
- Engine speed between 450 rpm and 4000 rpm
- Engine temperature -10 锟斤拷C ...+ 100 锟斤拷C (50 锟斤拷F ... 212 锟斤拷F)
- Drive with different load and speed ranges
Possible fault causes
- Predelivery quantity or pressure in fuel low-pressure circuit too low
- Teaching of the fuel high-pressure control necessary
P1026
P1026
Diagnosis information - DME V8 DFI
Fuel high pressure implausible
NOTE:
- Faults in the fuel high-pressure injection area are often caused by defects in the predelivery circuit (fuel low-pressure).
- Therefore, if there are problems in the fuel high-pressure injection area, the predelivery circuit must be checked first.
- The fault type ]Upper limit value exceeded[ or ]Lower limit value not reached[ does not necessarily have any significance.
- It is possible to read out in the extended fault memory whether the fault entry has been caused by the value exceeding or not reaching the
respective limit:
- refer to the fault memory under
--> >[F8] INFORMATION<
--> >[F5] ENVIRONMENTAL CONDITIONS<
--> >Environmental conditions when fault first occurred<
--> Environment 6 (last value) is the fuel high pressure when the fault occurred:
- Value < 10 bar means that the pressure was below the limit
- Value > 135 bar means that the limit was exceeded
CONVERSION:
- 10,000 hPa = 10 bar = 10,000 mbar
- 1,000 kPa = 10 bar = 10,000 mbar
- 1 MPa = 10 bar = 10,000 mbar
Diagnostic conditions
- Battery positive voltage > 9 V
- Engine start recognized > 5 sec.
- Engine temperature -10 锟斤拷C ... +100 锟斤拷C (50 锟斤拷F ... 212 锟斤拷F)