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Home >> Porsche >> 2023 >> Taycan Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 101 (20 Fuel Supply, Actuator 4.0L Turbo Hybrid -- 971 - PANAMERA (971)) >> WM, 200201 Checking Fuel Pressure (Petrol) >> Preliminary Work >> Checking Fuel Pressure

Checking Fuel Pressure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2023 Porsche Panamera, 2022 Porsche Panamera, 2021 Porsche Panamera, 2020 Porsche Panamera, and 2019 Porsche Panamera. However, it is still accessible from the selected car via links, so may be relevant.
  1. > 9900 - PIWIS tester 3  must be connected and switched on.
  2. Switch on ignition (fuel pump is activated briefly).
  3. Perform fuel pressure test using > 9900 - PIWIS Tester 3  .
    1. 3.1 Select the Diagnostics  function.
    2. 3.2 Select the DME  control unit in the control unit overview.
    3. 3.3 Switch to the Drive links/checks  menu item.
    4. 3.4 Select the Drain fuel tank  function and press F12=Next.
    5. 3.5 Activate the Drain fuel tank  (= activate fuel pump) function by pressing F8=Start. The process can be ended at any time by pressing F8=Stop.
    6. 3.6 Read off the pressure shown on the pressure gauge.

      Check fuel pressure: 

      > Fuel pressure 6.5 bar +/- 0.2 bar 

    7. 3.7 Deactivate the Drain fuel tank  function by pressing F8=Stop.
      1. 3.7.1 Exit the function.
    8. 3.8 Switch off ignition, switch off > 9900 - PIWIS Tester 3  and disconnect adapter line in the vehicle.
    9. 3.9 Perform holding pressure test. 
      1. 3.9.1 System pressure must only drop by max. 1 bar after 30 minutes. 

        > Pressure 5.5 bar +/- 0.2 bar 

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