Driving Test Fault Categories and the 15 Fault Limit (2026)

Three grades of fault exist on the driving test report and only two of them are survivable. A driving fault, universally called a minor, is something that falls short of the standard of a safe and competent driver without being potentially dangerous. You are allowed up to 15 of them. A serious fault is one that is potentially dangerous or that breaks the law. A dangerous fault involves actual danger to you, the examiner, the public or property. One of either ends the test as a fail, no matter how clean the rest of the drive was.

#The public definitions and the examiner definitions are not identical

Worth knowing if you are trying to work out why a particular mark landed where it did. The public gov.uk wording describes a serious fault simply as "something potentially dangerous". The examiner manual is broader: a serious fault is "one that is potentially dangerous or entails a breach of the law". That second clause is not in the learner-facing version and it explains marks that otherwise look harsh, such as crossing a solid white line or entering a bus lane during its hours of operation where nobody was endangered at all.

The same manual defines a driving fault as one that falls short of or deviates from the defined outcome of the standard of driving of a safe and competent driver, and a dangerous fault as one involving actual danger to the examiner, candidate, the general public or property. Those definitions are the actual yardstick, and they are deliberately about outcome and risk rather than about how bad the mistake felt from the driving seat.

#The four ways to fail, and only four

Every failed car test in Great Britain falls into one of four routes, and understanding which one applies to you is the difference between a useful post-test debrief and a demoralising one.

• Failing the eyesight check. It happens before any driving, is recorded as a serious fault, and ends the test on the spot with no drive at all.
• One serious fault. Anywhere in the test, in any category, regardless of how many driving faults you have.
• One dangerous fault. Same effect, higher grade.
• Sixteen or more driving faults. Fifteen is a pass. The sixteenth is the one that costs you.

There is a fifth route hiding inside the fourth, and it catches people out. Repetition escalates. The examiner manual states that a candidate who habitually commits a driving fault in one aspect of driving throughout the test cannot be regarded as competent to pass. So the same minor made over and over is not simply a rising tally, it can be re-graded upward as a serious fault. Five separate driving faults spread across five different categories sits very differently from five identical mirror faults in a row.

#What an immediate fail actually looks like

The assessment guide publishes worked boundaries for every item on the marking sheet, which is unusually generous documentation and makes the minor-versus-major line much less mysterious than folklore suggests. Three examples show how consistently the line is drawn around consequence rather than around how untidy the driving looked.

That pattern is the single most useful thing to internalise before test day. Examiners are not scoring elegance. They are scoring whether your driving put anybody in a position they had to react to. It also explains why candidates who feel they drove badly still pass: an untidy gear change nobody had to respond to is worth less than a smooth, confident manoeuvre that made a cyclist swerve.

You can work through this classification yourself on our fault checker, which puts scenarios against the published DVSA boundaries so you can test whether your instinct for minor, serious and dangerous matches the marking guide rather than the internet.

#The top 10 faults, April 2025 to March 2026

DVSA publishes the ten most common faults on the car practical test as a ranked list, refreshed each year. The most recent published period runs from April 2025 to March 2026, and it looks like this.

• 1. Junctions, observation
• 2. Mirrors, change direction
• 3. Junctions, turning right
• 4. Response to signs, traffic lights
• 5. Control, steering
• 6. Move off, safely
• 7. Response to signs, road markings
• 8. Response to signs, traffic signs
• 9. Positioning, normal driving
• 10. Maintain progress, speed

Two things stand out once you compare the latest ranking with the period before it. First, the top of the list barely moves. Junctions and observation has been first, and mirrors on changing direction second, every year for as far back as the comparable data runs. Second, no reversing or parking manoeuvre appears anywhere in the top ten in the latest period or in the two before it, which is a useful corrective to how much lesson time the bay park tends to absorb.

DVSA also publishes example behaviours behind each ranked fault, written by DVSA rather than by driving schools, and they are more specific than the category names suggest. Observation at junctions covers failing to judge the speed of an approaching vehicle, entering a roundabout with a vehicle coming from the right, joining a dual carriageway from a slip road without looking, and simply looking too late. Mirrors on changing direction covers not checking when leaving a roundabout, making another vehicle slow down while changing lanes, and changing lane on a roundabout with a vehicle alongside.

That is the honest reading of the ranking. The faults at the top are not knowledge gaps. Every candidate knows to check mirrors before changing direction and to look before moving off. DVSA's own marking examples describe the problem as timing rather than comprehension: the moving-off fault is worded as incorrect timing of the blind spot check, and the mirrors fault as late use of the exterior mirror before changing direction. Both are habits that hold up in a quiet lesson and fall apart under test pressure, which is why the fix is repetition in demanding conditions rather than more revision.

#Where to take this next

If you want the classification drilled rather than read, work through the fault checker and then compare your reasoning against the published boundaries. For the categories themselves, driving test faults explained is the fuller reference, serious versus minor faults works through borderline cases, and how many minors you can have covers the 15 fault limit in more depth. For the faults at the top of the ranking specifically, junction observation is the highest-value single topic on the list.

On the exercises where the published boundaries are sharpest, see the four manoeuvres and what examiners mark and the emergency stop frequency change, both of which quote the same assessment guide used above. For the wider failure picture, why people fail the driving test and the most common faults breakdown start from the same ranking, and the national statistics page carries the current pass-rate data.

#Sources and further reading

The figures, fees, and procedures referenced in this article are verifiable on the official gov.uk pages below. PassRates.uk is built on the Driver and Vehicle Standards Agency’s open data, published under the Open Government Licence.

• Driving test (gov.uk)
• If you fail your driving test (gov.uk)
• Change or cancel your driving test (gov.uk)
• Driving eyesight rules (gov.uk)
• "Show me, tell me" vehicle safety questions (gov.uk)
• Open Government Licence v3.0 (nationalarchives.gov.uk)