DIAGNOSTICS &
FAULT FINDING
A warning light isn't a bill — it's a question. We use professional diagnostic tools and manual testing to pinpoint the exact issue, saving you from paying for parts you never needed.
5.0 GOOGLE RATING
STARTING PRICE
VERIFIED REVIEWS
About Our Service
ACCURATE FAULT FINDING WITHOUT THE MAIN DEALER GUESSWORK
At The Motor Medics Coventry, we believe that car diagnostics should not be a guessing game. When a warning light appears on your dashboard, it is not just a sign to replace a part. It is a clue pointing to a system that needs proper investigation.
We go beyond simple code reading. We analyse live engine data, test circuits, and physically inspect the likely fault path so we can identify the root cause before recommending any repair.
Common Symptoms
THE KIND OF FAULTS WE TRACK DOWN EVERY DAY
Not every warning light means disaster, but it does mean the car is trying to tell you something. We use the symptom to guide the right tests, not to guess at the repair.
Engine
Engine management light
Usually points to an engine, fuelling, emissions or sensor fault. It is one of the most common reasons drivers book diagnostics.
ABS
ABS warning light
Often linked to wheel speed sensors, ABS rings or wiring faults. Braking may still work, but the anti-lock system needs checking properly.
Airbag
Airbag warning light
Usually an issue within the restraint system such as seat connections, crash sensors, clocksprings or module faults that need fault-code tracing.
DPF
DPF warning light
Common on diesel cars used for short trips. The real cause can be soot loading, failed regenerations, or a related sensor issue rather than the filter alone.
Tyres
Tyre pressure warning light
Can be low tyre pressure, a puncture, a valve sensor issue, or a system reset problem. It is quick to notice, but not always quick to diagnose properly.
Oil
Oil pressure warning light
This can be serious. It may be low oil level, pressure loss, switch failure or an internal lubrication problem, so it is worth checking before more damage is done.
Engine
Engine management light
Usually points to an engine, fuelling, emissions or sensor fault. It is one of the most common reasons drivers book diagnostics.
ABS
ABS warning light
Often linked to wheel speed sensors, ABS rings or wiring faults. Braking may still work, but the anti-lock system needs checking properly.
Airbag
Airbag warning light
Usually an issue within the restraint system such as seat connections, crash sensors, clocksprings or module faults that need fault-code tracing.
DPF
DPF warning light
Common on diesel cars used for short trips. The real cause can be soot loading, failed regenerations, or a related sensor issue rather than the filter alone.
Tyres
Tyre pressure warning light
Can be low tyre pressure, a puncture, a valve sensor issue, or a system reset problem. It is quick to notice, but not always quick to diagnose properly.
Oil
Oil pressure warning light
This can be serious. It may be low oil level, pressure loss, switch failure or an internal lubrication problem, so it is worth checking before more damage is done.
Straight Pricing
WHAT'S IT LIKELY TO COST?
Select a diagnostic scan level to plan your check. Every job still gets a clear, fixed quote in writing before any repair work begins.
Our entry-level check is ideal for dashboard warning lights. It includes full-system code retrieval, live sensor checks, and an initial troubleshooting report.
INCLUDED SCANS & CHECKS
- ENGINE LIGHT SCAN
- ABS LIGHT SCAN
- AIRBAG LIGHT SCAN
- DRIVETRAIN WARNINGS
Diagnostic Process
WHAT YOU'RE ACTUALLY PAYING FOR
A proper diagnostic is a sequence, not a guess. Each step builds on the last so the final recommendation is backed by evidence.
Full module read
OBD-II Scan
Read active, pending and stored fault codes.
Sensor value checks
Live Telemetry
Compare real-time sensor data.
Physical verification
Component Test
Verify the likely component, wiring or supply.
Clear next step
Report & Quote
Explain the findings and next repair recommendation.
The Honest Explanation
CODE READING VS PROPER DIAGNOSIS
Many garages read a code and replace the part it mentions. We take a different approach, starting with the root cause, not the code.
A fault code is a starting point, not an answer.
We physically test wiring, supply, leaks, and mechanical conditions to confirm what's really causing the fault before replacing anything.
HOW WE HANDLE IT
OBD-II Scan
Read stored and pending fault codes.
Live Telemetry
Compare real-time sensor values.
Component Test
Verify wiring, supply, and the likely component.
Report & Quote
Clear explanation and next-step recommendation.
Genuine Proof
RECENT GOOGLE REVIEWS
alastair banks
2 weeks ago
"They are friendly, knowledgeable, and most important honest company. I took my car to them after being told by another local garage, that I needed my front calipers replacing, as well as discs and pads. They quoted £1100 + vat. Which is crazy for a 13 y/o kia. The Motor Medics checked the calipers are fine, discs and pads for nearly £1000 less. Great work and communications at all times. I cannot recommend them enough."
Will Stevenette
2 months ago
"Very happy with the service. Their quote was £200 cheaper than the garage that did my MOT and they were able to do it far quicker. Very pleased and thankful"
Vittoria W
2 months ago
"So happy with the service recently received from these three amazing guys. Having never heard of them (despite living nearby!) but reading excellent reviews on a local village facebook page, I decided to give them a go … and im just so glad i did! They diagnosed & fixed my poorly little cars multiple problems. A tiny glitch occurred not long after the major repairs, which they kindly sorted in minutes with no drama. Im so happy to have finally found a decent, trustworthy & professional mechanic, who i can rely on. Location and convenience of appointments also fits in with my work/life 🤩HIGHLY RECOMMEND🤩"
alastair banks
2 weeks ago
FAQ
DIAGNOSTIC FAQS
What does a diagnostic check actually tell me?
Can you turn off my warning light?
How long does a diagnostic test take?
Helpful Advice
RELATED GUIDES & INFO
READY WHEN YOU ARE
WANT STRAIGHT ADVICE BEFORE YOU COMMIT?
Tell us the symptoms, vehicle, or warning light. We will tell you what it likely needs, what can wait, and what is worth booking now.