Opel Astra-J, Zafira-C - Engine has speed variations | HELLA

Opel Astra-J, Zafira-C

Model year 2012-2013

Engine code: A14NET

Vehicles with automatic gearbox

Vibrations when pressing the brake pedal

Engine has speed variations

If this defect is determined on the vehicles specified above, this could be in conjunction with a software weakness of the gearbox control unit.

Test requirements:

  • The vehicle is stationary
  • Engine idles
  • Gearbox oil temperature higher than 80°C
  • Brake pedal is pressed and held
  • Engage shift stage "D"

If the defect is determined in this situation, shift to gear stage "M" for further tests.

If the vibrations and speed variations are no longer present after 5 seconds, the defect can be rectified by reprogramming the gearbox control unit.

The updating of the software is carried out in an authorized garage in this case.

Important safety note Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only. Reprinting, distribution, reproduction, exploitation in any form or disclosure of the contents of this document, even in part, is prohibited without our express, written approval and indication of the source. The schematic illustrations, pictures and descriptions serve only for the purposes of explanation and representation of the instructions and cannot be used as a basis for installation or assembly work. All rights reserved.

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