Stewart Mobile Repair service van
Check Engine Light Diagnostics

Check Engine Light.We Come to You.

Professional check-engine-light diagnosis at your home, work, or roadside—we find the real cause, not just the code.

4.9 rating ASE-certified BAR licensed Warranty-backed repair
We Come to You
Home · Work · Wherever Your Vehicle Is Parked
No shop visits.
No waiting rooms.
Just expert service.

Common Check Engine Light Causes

Loose gas cap
Surprisingly common and easy to miss.
Oxygen (O2) sensor
Affects fuel mix and emissions.
Catalytic converter
Emissions and performance issues.
Spark plugs / misfire
Rough idle, hesitation, or stalling.

It's rarely nothing—and rarely a disaster. + Get it scanned today.

What's Included

We find the cause behind the light—not just the code.

Professional code scan
We pull and interpret OBD2 codes.
Live data review
Sensor readings while it runs.
Root-cause testing
We verify the cause, not just the code.
Clear repair plan
Honest priorities and next steps.
Stewart Mobile Repair scanning a check engine light
Pro Scan ToolsDealer-level scanners and real-world testing—at your location.

Why Choose Stewart Mobile Repair?

We come to your location
Diagnosis at your home, office, or roadside.
We don't just clear the light
We find the cause so it doesn't come back.
Certified & trusted
ASE-certified · BAR licensed · fully insured.
Clear, honest plan
Know what's wrong and what it takes to fix.

How It Works

1
Request an Estimate
Tell us what the light is doing.
2
We Come to You
We arrive at your location.
3
Scan & Diagnose
Read codes plus real testing to find the cause.
4
Explain & Fix
Clear plan, then approved repairs on-site.

What Customers Are Saying

Google4.9(65 reviews)
Kenneth Kneis
Kenneth Kneis
3 months ago

Stewart Mobile repair experience was awesome. Mechanic showed up to my daughter's residence on time, communicated arrival timing...

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efficiently, diagnosed the Honda CRV issue quickly and explained findings thoroughly. Replaced alternator and battery same day. Very polite and professional service.

Veronica Pena
Veronica Pena
4 months ago

My nephew bought a car and it sprung a leak somewhere. It being an Audi I asked some friends who they used. Alex was...

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recommended by a couple of them. Well he did not disappoint. We called, he scheduled us in, he came and he fixed it same day. It took most of the day but it was done here at our home without having to tow it anywhere. Of course we will use his services again.

Amado Tadiarca
Amado Tadiarca
5 months ago

My Chevy Express 3500 wouldn't start and a previous tech said it was something completely different. Stewart Mobile quickly...

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diagnosed the issue and saved me hundreds, if not thousands, of would-be costs had I listened to the first tech. He was fast in responding and very professional.

Eric Tolani
Eric Tolani
7 months ago

Alex is meticulous when it comes to his craft. Definitely has a passion for cars that you can see with his attention to detail...

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and drive to get the job done efficiently and effectively. He works with OEM parts and offers warranty on his work equivalent to that of dealerships which is extremely rare for small business auto mechanics. He replaced the starter on my Infiniti Q60S. The starter is located in a place that's extremely difficult to find space to remove it, but with a little improvisation he made it work! He also buffed out a few minor scratches on my front bumper at no cost! His prices are very honest and his labor rate is extremely reasonable, especially in this economy. Definitely recommend Stewart Mobile Repair for all your auto repair needs. I know I'll definitely be calling him in the future!

Request Your Diagnostic Estimate

Tell us what the light is doing and we'll reply with a clear, honest estimate.

Request Check Engine Light Diagnostics Estimate

Built for drivers who want the repair done right.

4.9 Stars (65 Reviews)
12-Mo/12k-Mi Warranty
ASE-Certified & Licensed
Step 1 of 2Your vehicle & the problem

Example: 2020 Honda Civic. Model suggestions are optional; you can type manually.

Step 1 of 2 — takes about 30 seconds.

Your information is secure and never shared.

Frequently Asked Questions

Can you diagnose a check engine light at my location?
Yes. We can scan codes and perform practical checks at your location for most check-engine-light concerns.
Do you only clear the codes?
No. Clearing codes without finding the cause just hides the problem until the light returns. We focus on identifying the real repair.
Is it safe to drive with the check engine light on?
A steady light usually means you should get it checked soon. A flashing light can signal a serious problem—reduce speed and have it checked right away.
Could it just be a loose gas cap?
Sometimes, yes. A loose or failing gas cap is a common cause. We confirm it rather than guessing, so you don't replace parts you don't need.

Don't Ignore the Light.We Come to You.

Accurate. Honest. Professional.

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