P0089-64 (E8) Fuel Pressure Regulator Performance

Discussion in 'Range Rover' started by EdwardRRS, May 17, 2019.

  1. EdwardRRS

    EdwardRRS New Member

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    Hi,

    2016 Range Rover Sport Supercharged -85K miles- Out of Warranty.

    Code using an IIDTool BT

    P0089-64 (E8) Fuel Pressure Regulator Performance- Algorithm based failure-Signal Plausibility Failure.


    Search on the Internet mentioned.


    Might need to Update the PCM Software..How does one do that?

    A Part might be bad. Which Part is bad?

    Fuel Pump? Low Pressure or High Pressure Pump?

    Sensor or Sensors?

    Regulator?
     
  2. joey

    joey Custom Rover Accessories Staff Member

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    Any software updates with require either the dealership or a Land Rover Specific mechanic as they will need that lovely $10k computer to install the update.

    Not sure what the error ends up being.
     
  3. EdwardRRS

    EdwardRRS New Member

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    The Check Engine Light disappeared for a day and a half and returned today. I overfilled the tank and it went away. When I hit 75%, the Check Engine Light reappears.
     

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