2010 Porsche Panamera Turbo (970) V8-4.8L Turbo A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 550

2010 Porsche Panamera Turbo (970) V8-4.8L Turbo A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 550

Fault setting conditions

- Internally measured current is too high

Fault effects

- Solenoid valve 2 switch-off

- Transmission limp-home indication in instrument cluster control unit

P1021

P1021

Diagnosis information - Control unit DME (DFI)

Fuel high-pressure Quantity

INFORMATION

- Faults in the fuel high-pressure injection system are often caused by defects in the pre-delivery system (fuel low pressure).

- Therefore, if there are problems in the fuel high-pressure injection area, the predelivery circuit must be checked first.

Diagnostic conditions

- Engine speed 450 ... 4000 1/min

- Engine temperature -10 ... +100 锟斤拷C (锟斤拷F)

- Trip with different operating conditions

Possible fault causes

- Pre-delivery quantity or pressure in fuel low-pressure circuit too low

- Quantity control valve Faulty (in Fuel high-pressure pump)

- Fuel high-pressure pump Faulty

Fault setting condition(s)

- Deviation Actual value Quantity control (Fuel high-pressure)

P1023

P1023

Diagnosis information - Control unit DME (DFI)

Fuel pressure/quantity too low at start

INFORMATION

- This fault entry can be caused by diverse reasons.

- Fault finding is to be performed only if a customer complains about excessively long starting times.

- If there is no such customer complaint, the only measure to be taken is to clear the fault memory.

Diagnostic conditions

- Engine start

- Engine temperature -10 ... +100 锟斤拷C (锟斤拷F)

- Engine running > 5 Second(s)

Possible fault causes

- Pre-delivery quantity or pressure in fuel low-pressure circuit too low (See [Information 1])

- Quantity control valve Faulty (in Fuel high-pressure pump)

- Fuel high-pressure pump Faulty

Fault setting condition(s)

- low-pressure start enabled (See [Information 2])

INFORMATION

1. - Faults in the fuel high-pressure injection system are often caused by defects in the pre-delivery system (fuel low pressure).

- Therefore, if there are problems in the fuel high-pressure injection area, the predelivery circuit must be checked first.

2. - Starting in the low-pressure range is enabled if the required fuel pressure for a high high-pressure start was not reached or was not reached

quickly enough.

- Starting takes considerably longer (up to 2 sec.) as a result.

P1024

P1024

Diagnosis information - Control unit DME (DFI)

Fuel high-pressure after engine off too high