PRICE GUIDE · VEHICLES & TRANSPORT · 2026–2027
Car Diagnostics cost in the UK
£53–£120 per check. Typically £65.
A warning light on the dashboard usually means a diagnostic check, and in the UK that costs £53–£120, about £65 on average. A plain fault-code read is cheapest; tracing an electrical fault, a premium car or a main dealer pushes it higher.
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HOW MUCH IT COSTS
How much does car diagnostics cost in the UK?
| Low end | £53 | a fault-code read at an independent garage |
|---|---|---|
| Typical | £65 | what most people pay |
| High end | £120 | electrical fault-finding on a premium car in London |
Locufy guide prices for 2026–2027. Updated 2026. A national range, not a quote — enter your town above for real prices from the garages, mobile mechanics and valeters near you.
What moves the price
- Depth of the check — reading stored fault codes is quick, while tracing an intermittent electrical fault takes hours
- Make of car — premium and performance models need dealer-level diagnostic software and cost more to check
- Independent or main dealer — a dealer diagnostic check usually costs more than an independent garage
- Region — diagnostic rates in London and the South East run above the North, Scotland and Wales
- Mobile or garage — a mobile mechanic with a code reader saves a trip but may charge for the call-out
- Follow-up work — some garages knock the diagnostic fee off the bill if you let them do the repair
Vehicle maintenance prices in the UK are up 38% over five years (ONS Consumer Price Inflation, Maintenance and repairs, to 2026 August). Five years ago a typical car diagnostics would have cost about £50 — an estimate from today's guide price and that index, not a recorded price. Source: ONS MM23 D7ED →
WHAT YOU GET
What a car diagnostics booking includes
Takes: Thirty minutes to an hour for a standard check; longer for intermittent electrical faults. Not included: The repair itself, replacement parts and any software updates are priced once the fault is found — see the related guides below.
WHAT PEOPLE BOOK
Common car diagnostics jobs
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Car Diagnostics near you, with prices shown
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How to pay less
- Ask whether the diagnostic fee is deducted if the same garage carries out the repair
- Note when the warning light comes on and any symptoms, which shortens the diagnostic time
- Use an independent garage with the right diagnostic tools rather than a main dealer for older cars
Before you book
- Check whether the price covers a full diagnostic check or only a fault-code read
- An engine warning light lit on the dashboard is an MOT fail, so book the diagnostic before the test
- Stop driving if a warning light is red or flashing, and ask for a mobile diagnostic instead
- Ask for the codes and findings in writing so another garage can quote for the repair
Car Diagnostics cost: questions people ask
£53–£120, with £65 about average. A quick code read at an independent garage is the cheapest; a long electrical fault-finding session at a dealer is the dearest.
Usually thirty minutes to an hour. Faults that come and go can take longer, as the technician may need to road-test the car to make them appear.
It can. An illuminated engine management light, or an ABS or airbag warning, is a reason for failure, so it is worth having the fault diagnosed and fixed first.
A cheap reader shows the stored codes, but not always the cause. A garage check adds live data and the experience to tell a failed part from a symptom.
The repair, any parts and software updates are extra. The check tells you what is wrong and what it should cost to fix.
They are Locufy guide prices for the UK, taken from published UK garage booking data and cost guides. They show a national range rather than a quote, and the car and the garage decide your own price.
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