Reversing Not poss consult workshop

Discussion in 'A-Class' started by Gozomerc, Jul 14, 2017.

  1. Gozomerc

    Gozomerc New Member

    Hi all

    Would appreciate a little help, my A45 AMG started meddling with the gears recently, error showing up on display - reversing Not poss consult workshop.

    When scanned via OBD adapter I get error P0921.Gear Shift Forward Actuator Circuit Range/Performance

    Can someone guide me on this problem?


  2. Hi Jason.

    Based on the code you provided sounds like the selenoids on the valve body are defective.

    You may want to use a OBD2 scanner that can read MB specific fault codes. Or if you know a shop that has Star Diagnostic scanner they can connect it and perform some testing and actuation of the sensors.

    What auto transmission model do you have?
  3. Gozomerc

    Gozomerc New Member

    Hi Mercedes fanatic

    Thank you for your feedback.

    The transmission is a dual cluth gearbox.

    During the problem the car only shifts from 2 - 4 - 6 gears only it completely dismisses the odd numbers out including reverse.

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