Check engine light on? Get answers today, not next week.
Call nowCheck Engine Light On? Get Answers Today, Not Next Week
Rated 4.9/5 by over 300 Edinburgh drivers for honest, plain-English diagnostics.
A fault code is a clue, not an answer. We read every module, interrogate live data and freeze-frame information, and pinpoint the actual failure so you only pay to replace the part that is genuinely faulty.
Should I worry about the check engine light?
A steady light usually means get it scanned within a few days; a flashing light means stop driving and call us now — it can point to a misfire that damages the catalytic converter.
4.9★
Average rating
1,800+
Cars fixed
12 mo
Guarantee
24/7
Availability
Home / Services / Check Engine Diagnostics
At a glance
Check Engine Diagnostics
- From
- From £49 diagnostic scan
- Time on site
- 45–90 minutes
- Where
- Home, work or roadside
- Guarantee
- 12 months, parts and labour
- Availability
- 24 hours, 7 days
Why people call us
Check Engine Diagnostics without leaving your street
- 01No garage drop-off and no waiting room
- 02Fixed price agreed before any work starts
- 03Qualified mechanic with the right tools on board
- 04Most jobs finished in a single visit
- 0512 month guarantee on parts and labour
Home · Work · Roadside · Anywhere in Edinburgh
Is it worth sorting check engine diagnostics now?
A warning light on the dash tells you almost nothing on its own — it could be a loose fuel cap or a failing sensor that leads to a much bigger bill if it's ignored. Guessing wastes money, and driving around with an unexplained fault isn't worth the risk on Edinburgh's hills and dual carriageways.
We've been running dealer-level diagnostic equipment across Edinburgh since we started, and we've scanned everything from city runabouts in Leith to imported performance cars in Morningside. Every mechanic on the team is IMI qualified and reads live data, not just the fault code.
Scans start from £49, and if you go ahead with the repair on the same visit, that fee comes straight off the bill.
Short answer
A steady light usually means get it scanned within a few days; a flashing light means stop driving and call us now — it can point to a misfire that damages the catalytic converter.
Check Engine Diagnostics options
Pick what suits your car and budget — we confirm the right option once we see it.
Basic code read
Quick scan of the engine control unit to pull stored fault codes and clear the light if it's safe to do so.
From £49
Full multi-module scan
Every module checked — engine, transmission, ABS, airbag — useful for intermittent or unexplained faults.
From £69
Live data diagnosis
Sensors monitored in real time while the engine runs or the car is driven, to catch faults that only appear under load.
From £79
Hybrid/EV system scan
Battery management, inverter and high-voltage system checks for hybrid and electric vehicles.
From £89
Your check engine diagnostics covers
- Dealer-level diagnostic scan of every relevant module
- Plain-English explanation of what the code actually means
- Live data check where the fault could be intermittent
- Fixed, written repair quote before any work starts
- Light cleared if it's safe to do so, with the cause explained
- Diagnostic fee credited if you book the repair the same visit
Time on site
Most scans take 45–90 minutes, longer if we need to road test for an intermittent fault.
From £49 diagnostic scan
Typical starting price
45–90 minutes
On site
12 months
Guarantee
IMI / City & Guilds qualified
Fully insured, DBS-checked mechanics with the right tools and torque settings for your make and model. Every job is backed by our 12 month parts and labour guarantee.
Check Engine Diagnostics prices in Edinburgh
Clear prices up front, confirmed for your car before any work starts.
Prices are a guide and include labour unless stated. Parts prices vary by make, model and availability — you always get a fixed quote before we begin.
When to book this service
If any of these sound familiar, do not leave it — small faults become expensive quickly.
Illuminated warning light
Steady means book a scan soon; flashing means stop and call us, as it can point to an active misfire.
Rough idling
The engine shakes or stumbles at a standstill, often a sign of a misfire or vacuum leak.
Reduced power or hesitation
The car feels sluggish or hesitates under acceleration, sometimes triggering limp mode.
Unusual smells or smoke
A burning or fuel smell, or smoke from the exhaust or bonnet, needs checking straightaway.
Poor fuel economy
A sudden drop in miles per gallon often points to a sensor or fuelling fault worth scanning early.
Why Edinburgh drivers trust us for check engine diagnostics
City driving here is hard on cars. We know exactly how, and what it does to your vehicle.
Cold-snap faults
Damp mornings and sudden cold snaps around Edinburgh often bring on intermittent electrical and sensor faults that only show up on a live-data check.
No vague diagnostic fees
Chain garages in the city often charge a diagnostic fee before you even know what's wrong. We give a plain-English cause and a fixed quote on the spot.
Short-journey wear
Lots of stop-start driving between Leith and the city centre means engines rarely reach full temperature, which can trigger emissions-related codes that a longer motorway run would clear.
4.9★
Average rating
600+
Reviews
1,800+
Cars fixed
10 yrs
Experience
A recent visit, start to finish
Corstorphine · 2016 Ford Focus
The light that three garages couldn't pin down
Graham from Corstorphine had been quoted for a new catalytic converter by two different places after his check engine light kept coming back. We ran a full multi-module scan on his driveway and found a worn ignition coil causing a mild, intermittent misfire — nothing to do with the exhaust at all. We replaced the coil there and then and cleared the code.
“Two garages wanted to sell me a £600 part I didn't need. FA found the real fault in an hour and fixed it on the spot.”
Graham T.
Corstorphine
£118 total (scan + coil)
Price paid
1 hour 10 minutes
Time on site
Light cleared, no misfire on the return road test
Outcome
What Edinburgh drivers say
“My car's light kept flashing on and off. FA scanned it in my driveway near the Stockbridge market and found a faulty oxygen sensor for £69 all in — a garage had quoted me £150 just to look at it.”
Priya S.
Stockbridge
“Booked a same-day slot near the university. The mechanic explained the fault code in plain English, not jargon, and the £49 fee came off my repair bill. Would use again.”
Callum B.
Newington
“Thought I needed a new gearbox based on a garage quote. FA's live data scan showed it was a sensor fault costing £89 to fix, not £900. Genuinely honest service.”
Fiona M.
Musselburgh
What affects the cost of check engine diagnostics
Every quote is confirmed for your specific vehicle before we start — this is a guide only.
Starting price
From £49 diagnostic scan
Check Engine Diagnostics
Dealer-level scanning with live data to find the real cause, not just the code.
Typical time: 45–90 minutes
Get a fixed quoteWhat can change the price
- 1Number of fault codes and modules involved
- 2Whether further testing (smoke, compression) is needed
- 3Complexity of tracing an intermittent fault
- 4Any repair carried out afterwards
Prices are a guide. Your final price is confirmed for your exact car before any work starts — no hidden extras.
Check Engine Diagnostics across Edinburgh
We travel from 11 Forrest Rd to every EH postcode and the surrounding towns — no callout fee inside the city.
Check Engine Diagnostics questions
What does the check engine light actually mean?+
It means the engine control unit has detected something outside normal range, which could be minor (a loose fuel cap) or serious (a misfire). It's not possible to know without a scan, which is why guessing based on the light alone often leads to unnecessary parts being replaced.
Will you clear the code for free?+
If the scan shows it's safe to clear and there's no active fault causing it, we'll clear it as part of the visit at no extra charge. If the underlying cause hasn't been fixed, the light will simply come back, so we'll always tell you honestly rather than just wiping it.
How accurate is a mobile diagnostic scan vs a garage?+
We use the same dealer-level scanning equipment a main garage would use, reading live data across every module rather than just the engine code. The accuracy is the same — the difference is you get the result on your driveway rather than waiting days for an appointment.
What if the fault doesn't show up during your visit?+
Intermittent faults can be tricky, so we check live data and, where needed, take the car for a short road test to try to recreate the conditions that trigger it. If it genuinely won't show, we'll advise on what to look out for and come back at no extra call-out cost when it recurs.
Do you fix the issue same day?+
In most cases, yes. If the fault is a common part like a sensor, coil or ignition component, we usually carry it or can collect it from an Edinburgh supplier within the hour, so the whole job is done in one visit.
Other services you may need
Book your check engine diagnostics today
From £49 diagnostic scan, 12 month guarantee and a 4.9 star rating from Edinburgh drivers. Call any time — we answer 24 hours a day.
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