This code means that the VDO tachograph has detected that the additional, independent motion signal is missing or not available. Code 81 is generated when the tachograph is unable to receive a valid secondary motion signal. This signal is used as a cross-check to...
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Error Code 65 – Security Breach (slot 2)
This code means that the tachograph has detected a security breach while authenticating a tachograph card in slot 2 (Driver 2). Code 65 appears when the tachograph is unable to successfully verify the identity of a card inserted into slot 2. Although described as a...
Error Code 34 – Ejection not possible
Code 34 appears when the tachograph cannot eject the card because certain operating conditions are not met. Most commonly, this happens while the vehicle is moving, during an active data download, or while the tachograph is actively reading from or writing to the...
Error Code 20 – Sensor Fault
Error 20 relates to a motion sensor fault, which can affect how vehicle movement, speed and distance are recorded and will cause issues during roadside checks or compliance reviews. To make sure this is a genuine fault, drivers should turn the vehicle ignition off and...