Car diagnostics
Accuracy, reliability, peace of mind – a good diagnosis changes everything. Whether it’s a light on or strange behavior, our experts find the cause quickly.
A light comes on? Let’s shed some light on the situation

Request an appointment online or by phone for a complete diagnosis.

Come to the workshop for a visual, mechanical or electronic inspection.

Leave with a clear explanation of the vehicle’s condition and recommendations if necessary.
Why choose Alex for your diagnostics and inspection?
Full reading, no guesswork
Our electronic diagnostic tools read fault codes with precision, on all systems: engine, transmission, ABS, air conditioning, TPMS, etc. You know exactly what’s wrong. You know exactly what’s wrong.
Clear, jargon-free explanations
We translate the codes into human language. We explain what’s involved, what’s urgent, and what can wait. You leave with a clear picture of your vehicle.
No pressure, just the facts
We give you the information, the options, and you decide.
Fast response, rigorous verification
Our team performs cross-tests, checks sensors, visually inspects critical areas – for a complete diagnosis, not just code reading.
Up-to-date tools, a trained team
Today’s vehicles are complex. We have the right equipment and technicians who know how to use it – on newer and older models alike.
Why diagnose your vehicle?
A warning light on? An unusual noise? A loss of performance? Electronic diagnostics can quickly identify the source of a problem, before it becomes more serious… and more costly.
Today’s vehicles are increasingly complex: engines, brakes, transmission, air conditioning, safety… everything is electronically controlled.
A simple warning light can hide a mechanical, electrical or software problem. A good diagnosis allows you to:
- Pinpoint the source of a problem (even intermittent ones)
- Save time and avoid unnecessary repairs
- Detect on-board computer error codes
- Prevent future breakdowns by intervening at the right moment
- Evaluate the general condition of the vehicle (useful before a purchase or a long trip)
At Alex Pneu et Mécanique, we use state-of-the-art diagnostic tools compatible with most makes and models. Our team analyzes codes, checks related systems and delivers a clear, jargon-free report. Request an appointment today – we’ll pinpoint the real problem.

Frequently asked questions about electrical diagnostics
What is the purpose of electronic diagnostics?
An electronic diagnostic test allows you to quickly detect problems recorded by the vehicle’s sensors (engine, transmission, brakes, etc.). This helps identify the source of a warning light or abnormal behavior without unnecessary disassembly.
When should I have a diagnostic test performed?
As soon as a warning light comes on in the dashboard (e.g., check engine, ABS, airbag), or if you notice any unusual signs: difficult starting, loss of power, excessive fuel consumption, strange noises, or vibrations.
Can diagnostics find all problems?
It identifies faults detected by electronic sensors, but some mechanical or physical problems (wear, leaks, noises) may require visual inspection or additional tests.
Do I have to pay for the diagnosis even if I don't have the repairs done?
Yes, you will have to pay for the time the technician spent performing the diagnosis, even if you do not have the repairs done.
Can you diagnose all types of vehicles?
Can a warning light be cleared without repair?
It is possible to reset certain warning lights, but if the underlying problem is not corrected, the warning light will quickly reappear. This is a temporary solution that should be avoided unless absolutely necessary (e.g., after a repair has already been carried out).
What our customers say about us…

Merci !
Come and see us at the garage
Contact us
Email: info@alex.ca
Phone number: (514) 521-5500
Opening hours
Monday: 7:30am – 5:00pm
Tuesday: 7:30 – 17:00
Wednesday: 7:30 – 17:00
Thursday: 7:30 – 17:00
Friday: 7:30 – 17:00
Saturday: Closed
Sunday: Closed
Get a complete car diagnosic
A warning light on your dashboard? Does your engine lack power, consume more fuel than before or make an unusual noise? Don’t let doubts creep in.
We can help:
Reading error codes with an electronic diagnostic tool
Identify engine, brake, transmission or sensor faults
Detect hidden problems before they become costly
Provide you with a clear report with concrete explanations
A good diagnosis is the starting point for an efficient repair and avoids unnecessary interventions. At Alex, you’ll leave with a clear picture of your vehicle’s condition – and the right advice for what to do next. Request an appointment now.
Fill in this form and an advisor will call you back as soon as possible.