2010 Porsche Cayenne S (9PA) V8-4.8L A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 59
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
P0458
P0458
Diagnosis information - DME V8 DFI
Driver for tank vent
Diagnostic conditions
- 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
P0459
P0459
Diagnosis information - DME V8 DFI
Driver for tank vent
Diagnostic conditions
- 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
P0501
P0501
Diagnosis information - DME V8 DFI
Vehicle speed
Diagnostic conditions
- Battery positive voltage between 10 V and 16 V
- Engine temperature > 30 锟斤拷C (86 锟斤拷F)
- Engine speed 1408 ... 3000 rpm
- Vehicle speed > 20 km/h (13 mph)