2010 Porsche Panamera Turbo (970) V8-4.8L Turbo A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 431
or:
- Diagnosis starts under the following conditions::
- Engine running, at:
- Ambient temperature > 5 锟斤拷C (锟斤拷F)
- Engine start temperature 5 ... 32 锟斤拷C (锟斤拷F)
- Secondary air injection Active
- none of the following faults stored : Oxygen sensor in front of catalytic converter, Coolant temperature sensor Engine, Camshaft
adjustment, Ambient pressure, Ambient temperature
- Diagnosis ends under the following conditions:
- Oxygen sensor in front of catalytic converter not ready for operation
- Period of time total (Diagnosis) exceeded (depending on: Engine start temperature)
- Diagnosis will be interrupted for as long as the following conditions exist:
- Engine speed > 3,500 1/min
- Mass air flow > 750 mg/stroke
- Overrun phase(s)
Possible fault causes
- Catalytic converter Bank 1 and Bank 2 Faulty (broken)
- Short circuit to B+/ground or open circuit in the line Secondary air pump relay (Working current circuit)
- Secondary air pump relay Faulty
- Leads Secondary air injection leaks
- Secondary air valve Bank 1 and Bank 2 stuck / frozen
- Air-inlet duct (Engine) Narrowed /fouled
- Fuel/air mixture preparation not adapted
Fault setting condition(s)
- Deviation Lambda control Actual value [] Nominal value
- The diagnosis checks whether deviation of the oxygen sensors is as expected upon activation.
P0418
P0418
Diagnosis information - Control unit DME (DFI)
Final stage Secondary air pump relay
Diagnostic conditions
- Ignition on
Possible fault causes
- Loose contact or corrosion on connectors or lines
- Short circuit to B+/ground/between lines or open circuit in the lines Activation Secondary air pump relay
- Secondary air pump relay Faulty
P0421
P0421
Diagnosis information - Control unit DME (DFI)
Primary catalytic converter Bank 1 - Effect too low
INFORMATION
- Do not interchange the oxygen sensor in front of the 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 (锟斤拷F)
