How long does a diagnostic take?

Most faults are identified within an hour. Intermittent faults that only appear under specific conditions may need a longer road test — we'll always confirm timing before starting.

Does the £55 get put towards the repair?

Yes — if you go ahead with the repair on the same visit, the diagnostic fee is credited against the final bill.

Do I need to book, or can I just drop in?

Booking ahead guarantees you a bay and gets your car seen faster. Walk-ins are welcome when we have capacity — call ahead and we'll let you know.

Will the diagnostic find every possible fault?

We focus on the symptoms you report and any active warning lights. Intermittent issues may need a road test or a return visit if they only appear under specific conditions — we'll always be honest about that.

Do you cover all makes and models?

Yes. Our equipment covers petrol and diesel vehicles across mainstream and European marques. If something is unusually specialist, we'll tell you before you book.

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Technician analysing live diagnostic data beside an open engine bay

SERVICES · DIAGNOSTICS

Diagnostics & Fault Finding

Accurate diagnosis using proper testing and inspection before replacing parts — so you fix what's actually broken, first time.

Warning light investigationFault-code scanningClear repair recommendations

From £55024 7531 1911

What we do

A warning light isn't a diagnosis — it's a question.

Modern cars hide hundreds of sensors behind that glow on your dashboard. Guessing means paying for parts you never needed, sending your car back for the same fault, and losing trust in whoever's holding the keys.

We pinpoint the real fault, first time — with proper testing and inspection before a single part gets ordered.

Warning light investigation
Fault-code scanning
Clear repair recommendations

Diagnostic scanner connected to a family car in an independent Coventry workshop

Why choose The Motor Medics?

Clear work. Clear answers.

Evidence-led checks

We inspect and test before recommending parts or repair work.

Experienced technicians

Modern equipment is paired with practical workshop experience.

Clear priorities

You’ll know what needs attention now and what can sensibly wait.

Honest approval

No repair begins until the findings and price have been explained.

What’s included

Every diagnostic booking covers this

Warning light investigation

We trace every active light back to its real cause — not just the first code that comes up on the scanner.

Fault-code scanning

Full OBD-II scan across all onboard systems, cross-checked against live sensor data and a physical inspection.

Clear repair recommendations

A plain-English report and fixed-price quote — you decide what happens next, with nothing hidden.

Component-level electrical testing with a multimeter in an engine bay

Proper testing, not parts swapping

Car diagnostics in Coventry that find the cause

A fault code points us towards a system; live data and physical testing tell us what has actually failed.

Our Coventry diagnostic work combines dealer-level scan data with voltage, pressure, wiring and component checks. That evidence-led approach helps avoid replacing good parts and gives you a repair plan you can understand.

We investigate warning lights, intermittent running faults, ABS and airbag issues, charging problems and communication faults across most makes and models.

Live-data analysis
Component and wiring tests
Clear findings before repair

Simple process

How a diagnostic booking works

STEP 1

Tell us the symptom

Warning light, noise, or something that just feels off — book online or by phone and describe what you're seeing.

STEP 2

Full scan & road test

We run a complete OBD-II scan, check live sensor data, and road test where needed to confirm the fault under real conditions.

STEP 3

Clear report & fixed quote

You get a plain-English explanation of the fault and a fixed price to fix it — no pressure, no obligation.

Code reader versus proper diagnosis

What is the difference between a fault-code scan and fault finding?

Reading a stored code is the beginning of a diagnosis, not the final answer.

A diagnostic scanner can identify the system that reported a problem and show stored or pending fault codes. However, a code may be triggered by a failed component, damaged wiring, poor voltage, an air leak or another fault elsewhere in the system.

Proper car fault finding combines scan data with live readings and targeted physical tests. We follow the evidence until the cause is confirmed, then explain the repair options before parts are ordered. This is especially valuable for recurring warning lights and faults that another code reader has simply cleared.

Scan the affected systems
Compare live vehicle data
Test and confirm the cause

Comparison showing the difference between reading a fault code and confirming a vehicle fault through live data and physical testing — A code identifies the affected system; testing confirms which component or circuit is responsible.

Straightforward pricing

Diagnostics & Fault Finding

Includes full fault-code scan, warning light investigation and a clear written report with repair recommendations.

Starting from£55Book this service

Google reviews

Recent reviews from local drivers

Substantive written feedback pulled from our live Google Business Profile, including the reviewer’s Google profile photo where available.

4.9

113+ Google reviews

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Frequently asked questions

Diagnostics FAQ

Rare, but if it happens, we'll tell you honestly rather than guess. You only pay the diagnostic fee for the time and testing carried out — never for parts you didn't need.

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