2010 Porsche Cayenne S (9PA) V8-4.8L A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 93
- Leak in exhaust system between the two oxygen sensors on bank 1
- Oxygen sensor downstream, bank 1, faulty
P2271
P2271
Diagnosis information - DME V8 DFI
Oxygen sensor downstream, bank 1 - signal too lean / rich
NOTE:
This fault is detected if the oxygen sensor signal upstream deviates by a certain value from the control value (rich/lean mixture) within a certain time.
Diagnosis is initiated by fault detection in the mixture control.
Diagnostic conditions
- Relatively long drive in various operating states
- Diagnoses >Electrical fault of oxygen sensor downstream [or] Lambda correction downstream< must have taken place
Possible fault causes
- Leak in exhaust system between the two oxygen sensors on bank 1
- Oxygen sensor downstream, bank 1, faulty
P2272
P2272
Diagnosis information - DME V8 DFI
Oxygen sensor behind catalytic converter, bank 2 - signal too lean / rich
Diagnostic conditions
- Relatively long drive in various operating states
- Diagnoses >Electrical fault of oxygen sensor behind catalytic converter [or] Lambda correction behind catalytic converter< must have taken
place
Possible fault causes
- Leak in exhaust system between the two oxygen sensors on bank 2
- Oxygen sensor behind catalytic converter, bank 2, faulty
P2273
P2273
Diagnosis information - DME V8 DFI
Oxygen sensor behind catalytic converter, bank 2 - signal too lean / rich
Diagnostic conditions
- Relatively long drive in various operating states
- Diagnoses >Electrical fault of oxygen sensor behind catalytic converter [or] Lambda correction behind catalytic converter< must have taken
place
Possible fault causes
- Leak in exhaust system between the two oxygen sensors on bank 2
- Oxygen sensor behind catalytic converter, bank 2, faulty
P2294
P2294
Diagnosis information - DME V8 DFI
Driver for quantity control valve
Diagnostic conditions
- Vehicle voltage > 9 V
- Time since engine start > 5 s
Possible fault causes
- Short circuit to B+
- Short circuit to ground
- Open circuit in line
- Fuse F9 faulty (fuse carrier in plenum panel E-box)
- Quantity control valve faulty (in fuel high-pressure pump)