Free Check-Engine Scan
FREEscan
- Factory-level code read, any make
- Plain-language explanation of what the code means
- No appointment required
Check Engine & Diagnostics
Check Engine Light On?
We’ll Tell You Why.
A parts-store code reader gives you a number. Factory diagnostic equipment and current calibration data tell you what’s actually wrong, on any make. Free scan to start.
Free Check-Engine Scan. No Appointment Needed.
No purchase necessary.
Do You Need This?
What’s the Light Actually Telling You?
A code is a starting point, not an answer. Here’s how we get from one to the other.
The check engine light is on
The car is running rough or hesitating
Fuel economy that quietly got worse
Stalling or hard starting
An unusual smell or a hint of smoke
A dash warning light you don’t recognize
Your Options
Your Options
Extended Diagnosis
- Live data and component testing when the code alone isn’t the full answer
- Cost stated before we start
- Findings explained before any repair is quoted
Sensor & Component Repair
- Repair or replacement of the diagnosed part
- System re-scanned and verified after the fix
- Written estimate before anything is replaced
I’m Not Sure What I Need
FREEinspection
- We scan it and look
- We show you what we find
- You decide from there
What to Expect
What Happens When You Bring It In
You describe what it’s doing
A light, a hesitation, a smell, a stall. You don’t need the part name.
We scan it and show you
Factory-level codes and live data, explained in plain language, free.
You get a written estimate
If the code points to a real repair, parts, labor and fees are itemized before we start.
We call before we exceed it
If extended diagnostic time turns up something bigger, work stops and we call.
Why Here
Factory Training Isn’t a Fence.
It’s Where We Start.
This is where factory diagnostic equipment stops being a talking point and starts being the whole difference. Current calibration data matters most exactly here.
A written estimate before we touch anything
Michigan law requires it above $50. We’d do it anyway. If a repair is going to run past the estimate, we call you first — every time.
Your warranty stays intact
Federal law protects your right to service your vehicle wherever you want. We’re not going to tell you otherwise. We’d just rather earn it.
Dealers usually cost less, not more
Cox Automotive’s 2025 study put the average dealership repair at $261 against $275 at general repair shops. Kelley Blue Book calls the opposite belief perception bias rather than reality.
Symptoms We See
Sound Familiar? Read More About It.
Where We Work
What Areas Does Lasco Auto Repair & Tire Serve for Check Engine & Computer Diagnostics?
We’re on Ali Drive off S Saginaw, minutes from I-75 and Hill Road, and a check-engine light is one of the most common reasons drivers across this area come looking for a real answer instead of a guess. Most diagnostic customers come from Grand Blanc and Grand Blanc Township, including the 48507 side of the Saginaw and Hill corridor, plus Burton, Davison and Swartz Creek.
Grand Blanc 48439
Grand Blanc Twp
Flint 48507
Burton 48509
Davison 48423
Swartz Creek 48473
Questions
Straight Answers
Does a free scan tell you exactly what’s wrong?
It tells you the code and what system it points to, which is most of the way there. Some codes need live data or component testing beyond the scan itself to pin down the exact cause — we’ll always tell you plainly if that’s the case before charging for it.
Why do generic code readers sometimes give a different answer than the dealer?
A basic reader pulls the code; factory-level equipment pulls the code plus manufacturer-specific data and calibration history, which is often what separates a correct diagnosis from a guess.
Is it safe to keep driving with the check engine light on?
A steady light usually means it’s safe to drive short-term but worth getting checked soon. A flashing check engine light means stop driving and get it looked at right away — that pattern typically signals a misfire that can damage the catalytic converter.
Will diagnostic work here affect my factory warranty?
No. Federal law protects your right to have your vehicle serviced wherever you choose without losing your factory warranty.
Get Your Free Check-Engine Scan.
No appointment needed — or schedule ahead online.
Related Services
Battery, Starter & Alternator
Charging system faults are one of the most common causes of an unexpected check-engine code.
Battery & electrical →A/C Repair
Some A/C compressor faults trigger a code before you notice anything from the vents.
A/C repair →Transmission Service
Shifting-related codes and symptoms often trace back here.
Transmission service →
Also From the Lasco Family
Shopping for a Vehicle, Not a Repair?
Two Lasco stores, both a short drive away.
Grand Blanc Mitsubishi
New Mitsubishi and used vehicles of every make, right here at 5470 Ali Drive.
Browse InventoryLasco Ford — Fenton
New Ford trucks and SUVs, 35+ years in business, two-time Ford President’s Award winner.
Visit Lasco Ford