2010 Porsche Cayenne S (9PA) V8-4.8L A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 58
- Vehicle voltage > 9 V
- Engine start recognized
Possible fault causes
- Short circuit to B+/ground/between lines or open circuit in the lines
- Tank vent faulty
Affected contacts on the DME control unit
Connector [B]:
- Contact 7
Affected contacts on the tank vent connector:
- Contact 2
P0455
P0455
Diagnosis information - DME V8 DFI
Tank system leak
Diagnostic conditions
- Short test Tank leak test
or:
- Vehicle voltage 9 V ... 16 V
- Ambient air pressure > 730 hPa (below approx. 2,400 ... 2,700 m above sea level)
- Engine temperature 5 锟斤拷C ... 50 锟斤拷C (41 锟斤拷F ... 122 锟斤拷F)
- Intake air temperature > 5 锟斤拷C (41 锟斤拷F)
- Fluctuations in the intake air temperature of less than 10 锟斤拷C (18 锟斤拷F)
- Time after engine start 5 seconds ... 20 minutes
- Steady speed with longer partial-load share for > 150 seconds
- Vehicle acceleration/deceleration -2 m/s2 ... +2 m/s2
- Vehicle speed 7 ... 120 km/h (4 ... 75 mph)
- Height difference < 20 meters
Possible fault causes
- Tank cap not closed correctly
- Tank cap faulty
- Vacuum system leaking
--> The system consists of the mechanical vacuum pump (on the vehicle engine), the leakage diagnosis pump, the intake pipe switch-over
valve and, where appropriate, the exhaust flaps in the rear muffler
- Vacuum pump faulty
- Tank vent valve has mechanical fault (does not close completely)
- Internal (diaphragm) or external leak in leakage diagnosis pump
- Tank system (incl. hoses) leaking
P0456
P0456
Diagnosis information - DME V8 DFI
Tank system leak
Diagnostic conditions
- Short test Tank leak test
or:
- Vehicle voltage 9 V ... 16 V
- Ambient air pressure > 730 hPa (below approx. 2,400 ... 2,700 m above sea level)
- Engine temperature 5 锟斤拷C ... 50 锟斤拷C (41 锟斤拷F ... 122 锟斤拷F)
- Intake air temperature > 5 锟斤拷C (41 锟斤拷F)
- Fluctuations in the intake air temperature of less than 10 锟斤拷C (18 锟斤拷F)
- Time after engine start 5 seconds ... 20 minutes
- Steady speed with longer partial-load share for > 150 seconds
- Vehicle acceleration/deceleration -2 m/s2 ... +2 m/s2
- Vehicle speed 7 ... 120 km/h (4 ... 75 mph)
- Height difference < 20 meters