‘Hardware sabotage’ will be displayed on the screen and an event will be recorded in the tachograph.

Impact on tachograph devices

We have received assurances from Stoneridge that this error does not affect the working of the tachograph. It will continue to operate correctly, even when displaying the message.

Vehicle operators can still use vehicles with these tachographs fitted. DVSA examiners can check the proper functioning of the tachograph. No action will be taken when this issue is identified in isolation.

Stoneridge will publish details of any rectification when available.

If a driver sees this error message, we advise them to take a manual printout so they can present this at a roadside stop if needed.

Travelling internationally

We cannot currently advise how other enforcement agencies will handle this issue.