Tachograph compliance guides

Who pays when a driver breaks the rules? Operator liability explained

The company answers for its drivers, including abroad — but evidence of instruction and regular checks can change that.

Tachograph rules for UK operators: DVSA, 56 days and your Operator Licence

Which regime applies after Brexit, why the roadside window doubled, what penalties cost and where the real risk sits.

Knowledge base

Tachograph symbols: digital icon meanings explained

Clear guide to the four activity symbols (driving, other work, availability, rest), card and crew icons, OUT, ferry/train mode and warning symbols every HGV driver should know.

Tachographs for vans: new obligation from July 2026

From 1 July 2026, vans of 2.5–3.5 t in international transport must have a digital tachograph. Find out who is affected, what you need and how to prepare.

Who must evaluate tachograph data from 2026

Trucks, buses, vans in international transport and self-employed drivers — a clear overview of all transport types subject to the evaluation obligation.

Digital tachograph: how to correctly download, evaluate and archive data

The complete compliance guide: deadlines 28/90 days, what you need, the correct process and what inspectors actually check.

Tachograph card: how to apply, renew and replace it

Where to apply, what it costs, how long it lasts and what to do if your driver tachograph card is lost or stolen. UK rules, 2026.

Internal DSRC fault: what tachograph error code 84 means

What the code means, what the manual says to do, and whether you can keep driving. Severity: Low.

VU internal fault

Critical — the vehicle unit has to be replaced. What Article 37 requires and whether you can keep driving.

Stored data integrity error

365-day mass memory corrupted. Why it sits in the security-breach family and what to do before the unit is swapped.

Internal GNSS fault: what tachograph error code 82 means

What the code means, what the manual says to do, and whether you can keep driving. Severity: Medium.

GNSS is missing: what tachograph error code 83 means

What the code means, what the manual says to do, and whether you can keep driving. Severity: Medium.

Ejection not possible — tachograph error code 34

Tachograph error code 34, ejection not possible: what it means, what the VDO DTCO 4.1 manual says to do, and whether you can keep driving.

Printing not possible — tachograph error code 36

Tachograph error code 36, printing not possible: what it means, what the VDO DTCO 4.1 manual says to do, and whether you can keep driving. Severity: Medium.

Card fault 41 — tachograph error code 41

Tachograph card fault 41 (Stoneridge SE5000, VDO DTCO 4.1): what it means, how to clear it by cleaning the card contacts, and when to replace the card.

Card not closed 44 — tachograph event code 44

Tachograph message card not closed 44 (Stoneridge SE5000, VDO DTCO 4.1): the previous session was not closed properly. What was lost and how to prevent it.

Card error 50 — tachograph error code 50

Card error 50 on a tachograph (Stoneridge SE5000, VDO DTCO 4.1): why the card is rejected, how to clear it, and the 15-day rule for driving without one.

Motion conflict — tachograph error code 80

Tachograph error code 80, motion conflict: what it means, what VDO DTCO 4.1, Stoneridge, Actia and EFAS-4 manuals say to do, and whether you can keep driving.

DSRC communication fault — tachograph error code 85

Tachograph error code 85, DSRC communication fault: what it means, what the VDO DTCO 4.1 manual says to do, and whether you can keep driving. Severity: Low.

GNSS anomaly — tachograph error code 96

Tachograph error code 96, GNSS anomaly: what it means, what the VDO DTCO 4.1 manual says to do, and whether you can keep driving. Severity: High.

ITS fault — tachograph error code 98

Tachograph error code 98, ITS fault: what it means, what the VDO DTCO 4.1 manual says to do, and whether you can keep driving.

Motion sensor fault 21: what it means and what to do

Tachograph error code 21, motion sensor fault: what the message means, what the VDO DTCO 4.1 manual says about it, and whether you can continue driving.