2010 Porsche Cayenne S (9PA) V8-4.8L A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 56
Possible fault causes
- When registered lambda error: :
- nature of the problem
- Remedy oxygen-sensor fault according to instructions then
- after a brief test described above
- Leak in exhaust system between engine and oxygen sensor behind catalytic converter
--> this especially affects trips with a mass air flow of < 400 mg/stk
- Oxygen sensors ahead of and behind catalytic converter bank X are interchanged
- Catalytic converter bank X faulty
P0431
P0431
Diagnostic information - DME V8 DFI
Catalytic converter conversion, bank X
NOTE: Do not use contact spray on the oxygen sensor's plug connections as this will result in irreparable damage to the lines (blockage of
reference air duct).
NOTE: Do not interchange the oxygen sensor ahead of catalytic converter with the sensor behind the catalytic converter as this will result in
implausible fault entries.
Diagnostic conditions
- Perform following short tests in sequence :
1. All models: Oxygen sensor short tests
2. Short test Tank vent
3. Short test Fuel supply Partial load
4. Short test Fuel supply Idle speed
5. Short test Catalytic-converter conversion
or:
- Engine temperature > 60 锟斤拷C (140 锟斤拷F)
- Time after engine starts > 10 seconds
- Catalytic converter temperature 500 锟斤拷C ... 800 锟斤拷C (932 锟斤拷F ... 1,472 锟斤拷F)
- 60 second drive with gentle acceleration at 25 ... 130 km/h (16 ...81 mph)
- Loading of carbon canister < 0.4
- Engine speed < 3,000 rpm
- Secondary air not active
- Tank ventilation not active
- Lambda control ahead of catalytic converter active
- Lambda control behind catalytic converter ready for operation
- No detection of oxygen sensor, mass air flow sensor or throttle valve adjusting unit fault
Possible fault causes
- When registered lambda error: :
- nature of the problem
- Remedy oxygen-sensor fault according to instructions then
- after a brief test described above
- Leak in exhaust system between engine and oxygen sensor behind catalytic converter
--> this especially affects trips with a mass air flow of < 400 mg/stk
- Oxygen sensors ahead of and behind catalytic converter bank X are interchanged
- Catalytic converter bank X faulty
P0441
P0441
Diagnosis information - DME V8 DFI
Fuel tank ventilation system
NOTE:
- In the case of the Turbo, the tank vent line feeds into both the connection piece of the positive crankcase ventilation as well as into a hose
which is routed to the intake side of the turbocharger.
- Diagnosis of the tank vent valve takes place 1 x per journey.
- The tank vent valve is detected as OK if the load factor of the carbon canister is > 0.7. This value guarantees that the load factor has been
re-taught. This is possible only if the tank vent valve is OK.
- If the load factor of the carbon canister is < 0.7, various engine variables are evaluated when the tank vent valve opens. These must change
correspondingly if the valve opens correctly. These engine variables include, for example: