Solid vs Flashing Check Engine Light: What Each Means and What to Do Next
A flashing check engine light and a solid one call for different next steps, and a light that goes out on its own can still leave a code behind.
Services · Diagnostics & Electrical
Diagnostics & electrical troubleshooting
A warning light tells you something is wrong. It doesn't tell you what. We use computerized diagnostic equipment and hands-on testing to track the fault to its source, so you pay for the repair that's actually needed.
At a glance
- Computerized diagnostics
- Check-engine & warning light diagnosis
- Electrical troubleshooting
- Electrical system repair
- Battery testing & replacement
- Fuel delivery & engine performance issues
What's covered
Diagnostic & electrical work we handle
A code reader gives a starting point. Proper diagnosis means testing the circuit, sensor or component the code points to — and checking what else could cause the same symptom — before recommending a repair.
- Computerized diagnostics
- Check-engine & warning light diagnosis
- Electrical troubleshooting
- Electrical system repair
- Battery testing & replacement
- Fuel delivery & engine performance issues
Common reasons people call
Warning lights & electrical symptoms
These are some of the signs that bring drivers in. None of them fix themselves — and most are cheaper to deal with early.
- 01Check-engine light
Steady: book a diagnosis soon. Flashing: ease off and stop somewhere safe — it can damage the catalytic converter.
- 02A battery that keeps dying
Fine one day, flat the next, or slow to crank in the cold.
- 03Flickering or dim lights
Headlights, dash or interior lights that come and go.
- 04Accessories that quit
Windows, locks, gauges or the radio acting up.
- 05Intermittent problems
The fault that disappears the moment you reach the shop.
- 06Poor running
Hesitation, rough idle or fuel economy that dropped off.
In detail
What computerized diagnostics typically involves
Reading a code is the start of a diagnosis, not the end of it. A full diagnosis typically includes:
- Reading stored and pending trouble codes, and the freeze-frame data saved when the fault was detected
- Watching live sensor data with the engine running
- Pinpoint tests on the circuit or part the codes point to, before any part is replaced
- Battery and charging-system testing when starting is the complaint
- What a solid or flashing check-engine light means for whether to keep driving
How on-board diagnostics store codes and freeze-frame data is set out in the OBD standards. Source
Check your vehicle for open safety recalls by VIN with Transport Canada.
Why proper diagnosis matters
The right fix starts with the right answer
01 · Find the cause
Test, don't guess
The same symptom can come from several places. Testing narrows it to the part that's actually failing.
02 · Explain it
Know what you're paying for
You'll hear what we found and why it matters before any work goes ahead, with upfront pricing.
03 · Fix what's wrong
No parts cannon
Replacing parts until the problem goes away is expensive. Diagnosis first keeps the bill to what's needed.
Guides & answers
Before you book
Plain-language answers to the questions drivers ask about diagnostics & electrical.
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Is a code scan the same as a diagnosis?
No. A code tells us which system reported a problem. Diagnosis is the testing that confirms which part or wire is actually at fault, so you're not paying for parts that don't fix it.
My check-engine light is flashing. What should I do?
A flashing light usually signals a problem that can cause damage if you keep driving. Ease off, get somewhere safe, and call the shop at 604-793-9310. More on solid vs flashing check-engine lights.
Can you test my battery?
Yes. Battery testing and replacement is part of our regular work, along with tracking down what's draining a battery that keeps going flat. Cold snaps are hard on batteries — here's how cold weather affects a car battery.
Related services
Often needed alongside diagnostics & electrical
Auto Repair
Engine, fuel system, belts, exhaust and the everyday repairs that keep a vehicle running.
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Oil Changes & Maintenance
Oil, lube & filter service, batteries, belts and the routine checks that head off bigger repairs.
View service
A/C & Cooling Systems
A/C recharge, repair and maintenance, plus cooling system and radiator-side service.
View serviceBook in for diagnostics & electrical
Send a request with your vehicle details and we'll get back to you, or call the shop line.