Kelias 95LEARNING SPACE
FREIGHT TRANSPORT

Learn and understand

Initial professional qualificationLithuania / EU · C / CE
87 / 300
QUESTION 087Not studied yet

A diesel particulate filter (DPF) warning appears on the dashboard. What should you do?

General principlesCompared with sources

Answer

Read the warning and follow the instructions for the specific truck: regeneration or servicing may be needed. Do not ignore the warning or disable the exhaust aftertreatment system on your own initiative.

Please note

Regeneration conditions and warning meanings depend on the model; this is not a procedure for carrying out regeneration.

A simple explanation

Different messages can indicate different filter loading levels or faults, so a warning light alone cannot determine a single action for all vehicles. If the manufacturer permits regeneration while stationary, carry it out only in a suitable location: the exhaust gases can be very hot. If instructed to stop or seek servicing, follow that instruction.

REMEMBER

DPF message → instructions → appropriate action.

Sources and checks

Editorial review: 2026-09-28.

Learning objective: Choose the manufacturer-specified action for a DPF message and assess the heat hazard during regeneration. EU syllabus area: 1.2. Different DPF warning states, the need for servicing and the hazard from hot gases during regeneration have been checked; specific Scania button procedures are not generalised.

Answer compared with sources: 2026-09-28.

How well do you know this question?

Search uses the selected topic and marks. A number + Enter opens any question.

Question map
RememberedReviewUpdated
Learning together and feedback

Try it together in 25–30 minutes

For an instructor and a small group: choose one C/CE freight transport topic in the Lithuania and EU context. Use your own devices, including a phone and a computer.

  1. 3 questions. In ‘Recall’ mode, first answer in your own words, then read the explanation and mark what needs more review.
  2. A lesson and a diagram. Discuss what they explain and which conditions matter.
  3. One scenario. Decide before revealing the solution. Explain the reasons for your chosen action.
  4. A few quiz questions. Read the explanation for each option. You can finish the quiz early; the remaining questions will be marked as unanswered.
  5. Discussion. Everyone names one useful point and one thing that needs correcting.

How can you share or suggest a correction?

You will find the question link and feedback field below this section. Lessons, diagrams and scenarios have their own ‘Copy link’ button. ‘Suggest a correction’ helps you prepare a note with the specific link and version label. Copy or download the text and pass it on for review.

Discuss: is it easy to find an answer and return to the question? Can you explain the reason and the limits of the rule's application? Which sentence is misleading? Flag any significant legal or safety uncertainty for checking before using the material.

Translated from the Lithuanian edition. The material concerns Lithuania and the EU; source-check dates refer to the Lithuanian answers.

Study materials for C/CE drivers: 300 questions with explanations, lessons, quizzes and practical scenarios. Based on Lithuania's and EU rules.

Kelias 95 on your computer

Install the app and learn in a separate window. Open it from your computer's apps menu or pin it to the taskbar.

  1. Open kelias95.kristalai.eu using Chrome or Microsoft Edge.
  2. Look for the install icon in the address bar. You can also choose ‘Install this page as an app’ in the browser menu. In Edge, this option is under ‘Apps’.
  3. Confirm installation. The app will open in a separate window.

An internet connection is required. Installing from the same browser profile uses the learning progress saved there. It is not automatically transferred to another browser or device.