Professional check-engine-light diagnosis at your home, work, or roadside—we find the real cause, not just the code.
It's rarely nothing—and rarely a disaster. + Get it scanned today.
We find the cause behind the light—not just the code.
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Stewart Mobile repair experience was awesome. Mechanic showed up to my daughter's residence on time, communicated arrival timing...
efficiently, diagnosed the Honda CRV issue quickly and explained findings thoroughly. Replaced alternator and battery same day. Very polite and professional service.
My nephew bought a car and it sprung a leak somewhere. It being an Audi I asked some friends who they used. Alex was...
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.
My Chevy Express 3500 wouldn't start and a previous tech said it was something completely different. Stewart Mobile quickly...
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.
Alex is meticulous when it comes to his craft. Definitely has a passion for cars that you can see with his attention to detail...
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!
Tell us what the light is doing and we'll reply with a clear, honest estimate.
Step 1 of 2Your vehicle & the problem
Our primary service area is around Fremont, generally within about 15 miles. We also serve extended Bay Area locations, including Dublin and Pleasanton. Availability depends on your exact address, vehicle, repair, scheduling, and a safe work area. Share your location so we can confirm the visit before scheduling.
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Accurate. Honest. Professional.
Tell us whether the light is steady or flashing, when it appeared, and whether the engine runs differently. Share any code or scan report you already have. A code describes a detected condition; testing helps determine whether the cause is a component, wiring, or another related problem before replacement is recommended.
Manufacturer guidance matters: the Ford owner’s manual warning-light guidance explains the risk of misfire and catalytic-converter damage when the light flashes. Check the instructions for your own year and model, as warning meanings and required actions vary.
For a vehicle that will not start or an electrical concern without a check engine light, see mobile diagnostics. If you are evaluating a used car, a pre-purchase inspection has a different scope from diagnosing one warning light.
Before your visit, read our guide: what to tell your mechanic when the check engine light comes on.
Tell us your vehicle year, make, model, symptoms, and where it is parked. If a part has already been diagnosed, share what was tested. We confirm the repair scope and provide an estimate before approved work begins.
Mobile work needs a safe and legal work area. Depending on the vehicle, repair, and parking conditions, we may recommend a shop referral.
Our primary service area is around Fremont, generally within about 15 miles. We also serve extended Bay Area locations, including Dublin and Pleasanton. Availability depends on your exact address, vehicle, repair, scheduling, and a safe work area. Share your location so we can confirm the visit before scheduling.
Eligible parts and associated labor are covered for 12 months or 12,000 miles, whichever comes first. Exclusions include customer-supplied parts, normal wear after use, and damage from misuse or subsequent repairs by another party. Read the warranty terms.