What a minor fault is
A minor fault, officially a driving fault, is a mistake that is not dangerous in itself but is not ideal driving. Examples include a slightly late mirror check, a small hesitation, riding the clutch briefly, or stopping a touch far from the kerb. On its own, one minor will not fail you.
The other two categories are far more serious: a serious fault is a potentially dangerous error and means an immediate fail, and a dangerous fault is one that caused actual danger.
How it is tested
The threshold is the number most learners remember:
- You can accumulate up to 15 driving faults and still pass.
- 16 or more driving faults is a fail, even with no serious or dangerous faults.
- A single serious or dangerous fault is a fail regardless of how few minors you have.
There is also a crucial nuance: repeating the same minor can turn it into a serious fault. If you keep making the identical mistake, say, repeatedly missing the same mirror check, the examiner may judge it a persistent habit that is potentially dangerous, and mark it serious. So a "harmless" minor matters if it keeps happening.
Why the threshold exists
The test allows a margin for small slips because no real drive is flawless. The 15-fault allowance recognises that a safe driver can make minor errors and still be safe overall. The dividing line is danger: minors are the small stuff, serious and dangerous faults are about risk to people and property. Tightening up your observation is the fastest way to cut your minor count, since so many trace back to it.
What kinds of errors become minor faults
Minor faults cover a wide range of small imperfections that do not create risk in themselves. Common examples include: checking a mirror slightly later than ideal; stopping a few centimetres further from the kerb than necessary; a momentary hesitation at a clear junction; a very brief stall quickly corrected; a small oversteer on a manoeuvre that you immediately correct; or a signal cancelled a second too late. None of these would alarm another driver or put anyone at risk, which is why they stay at the minor level.
The key characteristic is proportion: the error was small, isolated, quickly self-corrected, and did not require anyone else to take avoiding action.
How minors accumulate across the drive
Minors are recorded cumulatively across the whole forty-minute test. Each minor is logged against a specific competency, observations, mirrors, speed, positioning, and so on. At the end of the test, the examiner adds up the total. If you have been collecting one or two small slips per competency, they add up faster than expected. A candidate who makes five or six categories of occasional small errors can reach fifteen minors without a single serious fault.
The practical implication is to aim for consistency rather than brilliance. A calm, even drive with very few slips across all categories is better than a confident drive in most areas with a recurring weak spot in one.
When a minor becomes serious
The rule that catches people out is the pattern rule: the same minor fault recurring throughout the test can be upgraded to a serious. This reflects the examiner's judgement that a repeated error is not a one-off slip but a habit, and a habit is a predictable source of future risk. The fault category where this most commonly applies is observations: a candidate who repeatedly forgets the same mirror check is demonstrating a persistent gap, not an isolated error.
This is why it is worth addressing every minor your instructor marks, not just aiming to stay under fifteen. A minor repeated eight times is a serious fault; the same minor made once is a blip. Ask your instructor which competencies you are collecting minors in and focus your remaining practice there.
Practical strategies to reduce your minor count
Observations account for a large share of minors on most tests, mirror checks that are slightly late or slightly superficial. Strengthening your observation habit across the whole drive, not just at junctions but on every signal, every speed change, every parked car, typically reduces your total minor count significantly.
The second major source is hesitation: approaching junctions cautiously enough that you wait longer than the gap requires. This is usually a confidence issue that improves with route familiarity. Driving the roads around your test centre before test day, exactly what DriveRoutes is designed for, converts unfamiliar junctions into known quantities, which reduces the hesitation that triggers observation and timing minors.
The most important mindset shift around minor faults is to stop thinking of them as harmless. A single minor is harmless; a pattern of minors in the same competency is the road to a serious fault, and fifteen minors in total is a fail. Treat every minor your instructor marks as something worth understanding and addressing, not something to file away because it did not cause a problem this time.