2010 Porsche Panamera Turbo (970) V8-4.8L Turbo A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 551
Diagnostic conditions
- Engine temperature -10 ... +100 锟斤拷C (锟斤拷F)
- Engine running > 5 Second(s)
- then Ignition off > 10 Second(s)
Possible fault causes
- Loose contact or corrosion on connectors or lines --> Fuel high-pressure sensor
- Quantity control valve Faulty (in Fuel high-pressure pump)
Fault setting condition(s)
- Fuel high-pressure Drops too slowly after engine off
P1025
P1025
Diagnosis information - Control unit DME (DFI)
Fuel high-pressure Adaptation
INFORMATION 1
- Faults in the fuel high-pressure injection system are often caused by defects in the pre-delivery system (fuel low pressure).
- Therefore, if there are problems in the fuel high-pressure injection area, the predelivery circuit must be checked first.
Diagnostic conditions
- Engine speed 450 ... 4,000 1/min
- Engine temperature -10 ... +100 锟斤拷C (锟斤拷F)
- Trip with different operating conditions
Possible fault causes
- Pre-delivery quantity or pressure in fuel low-pressure circuit too low
- Adaptation Fuel high-pressure necessary (See [Information 2])
- Fuel high-pressure pump Faulty
INFORMATION 2
- The old values must be deleted prior to a new adaptation of the fuel high-pressure ranges.
- The fuel high-pressure adaptation values can be deleted with the [PIWIS-Tester II] as follows:
[DME] --> [Maintenance/repairs] --> [Delete adaptation values]
P1026
P1026
Diagnosis information - Control unit DME (DFI)
Fuel high-pressure implausible
INFORMATION
- Faults in the fuel high-pressure injection system are often caused by defects in the pre-delivery system (fuel low pressure).
- Therefore, if there are problems in the fuel high-pressure injection area, the predelivery circuit must be checked first.
Diagnostic conditions
- Period since engine was started > 5 Second(s)
- Engine temperature -10 ... +100 锟斤拷C (锟斤拷F)
- Engine running / Driving
Possible fault causes (See Fault setting condition(s))
- Below limit:
- Pre-delivery quantity or pressure in fuel low-pressure circuit too low
- Fuel tank (driven) empty
- See Extended fault memory
--> Actual value 40_Fuel Level Input [0%]
- Below limit or Limit exceeded:
- Quantity control valve Faulty (in Fuel high-pressure pump)
- Fuel high-pressure pump Faulty
Fault setting condition(s) (See [Information])
- Below limit:
- Fuel high-pressure average permanent < 10 bar
- Limit exceeded exceeded:
