Car Diagnostics & Maintenance in Richmond Hill
Computer diagnostics to find out why a warning light is on, plus oil change, lube and filter service to keep your engine protected between visits.
Accurate Answers Before Any Repair
A dashboard warning light, a rough idle or a sudden drop in fuel economy can have many different causes. Guessing wastes time and money. At 404 Auto Repair in Richmond Hill, we start with a computer diagnostic scan and a hands-on inspection so you know what is actually wrong before you decide on a repair.
Routine maintenance matters just as much. Regular oil, lube and filter service is one of the simplest ways to protect your engine and avoid larger problems later. If a scan or inspection points to a bigger issue, we explain your options in plain language, including engine and transmission work or brake and suspension repairs.
Our Diagnostics & Maintenance Services
Two core services that keep your vehicle reliable: finding problems early and keeping your engine properly maintained.
Computer Diagnostics
We connect a diagnostic scan tool to your vehicle’s onboard computer to read stored trouble codes and live data, then inspect the related system to confirm the cause.
- Check engine and dashboard warning lights
- Drivability issues such as rough idle, hesitation or stalling
- Electronic system fault codes
- Clear explanation of findings and repair options
Oil Change, Lube & Filter
Fresh oil and a new filter help reduce engine wear, keep parts lubricated and support reliable performance. We follow your vehicle’s recommended oil type and service schedule.
- Engine oil and oil filter replacement
- Lubrication service
- Quick visual check while your vehicle is in the bay
- Service for cars, SUVs and commercial vans
Signs Your Vehicle Needs Diagnostics or Maintenance
- The check engine light is on or flashing
- Other dashboard warning lights stay on after starting
- Rough idle, hesitation, stalling or loss of power
- Fuel economy has dropped without explanation
- Your oil change reminder is on or the service is overdue
- Oil looks dark or low, or you notice a burning oil smell
- New noises, vibrations or smells while driving
If you notice any of these, book a visit soon. A flashing check engine light can indicate a more serious problem, so limit driving and call us.
Why Timely Diagnostics & Maintenance Pay Off
Catch problems early
Small faults found during a scan are usually easier to fix than issues left until something fails.
Protect your engine
Clean oil and a fresh filter reduce wear on internal engine parts and help your engine last longer.
Repair with confidence
Knowing the real cause means you only pay for the repair your vehicle actually needs.
Explore Related Auto Services
Diagnostics & Maintenance Questions
What does a computer diagnostic check involve?
We connect a scan tool to your vehicle’s onboard computer to read trouble codes and live sensor data. Codes point to the system involved, so we follow up with an inspection to confirm the cause before recommending any repair.
Can I keep driving with the check engine light on?
A steady light usually means a problem should be checked soon. A flashing light can signal a more serious issue such as an engine misfire, so it is best to limit driving and contact us as soon as possible.
How often should I change my oil?
It depends on your vehicle, the type of oil and how you drive. Follow your owner’s manual or oil life monitor. If you are unsure, we can check your vehicle and recommend a schedule.
Do you offer diagnostics and oil changes for commercial vans?
Yes. We service Mercedes-Benz Sprinter, Ford Transit and Chevrolet Express vans. Learn more on our Commercial Van Repair page.
Warning light on? Oil change due?
Book a diagnostic check or maintenance visit at our Richmond Hill shop.
Auto repair shop at 10427 Yonge St in Richmond Hill, Ontario. Diagnostics, brakes, tires, commercial van repair and auto appearance services.
- 10427 Yonge St, Richmond Hill, ON L4C 0Z3
- (416) 731-2920
- info@404auto.ca
-
Mon–Fri: 8:30 AM – 6:00 PM
Saturday: 8:00 AM – 3:00 PM
Sunday: Closed