Mobile Electrical & Check Engine Light Diagnostics in DC, Maryland & Virginia
My Halo Auto provides mobile electrical diagnostics and check engine light service across DC, Maryland and Virginia. An ASE-certified technician reads OBD-II codes, tracks down wiring problems, services alternators and starters, and replaces sensors at your location.
5.0 on Google · ASE certified · Mon–Sat 7AM–7PM
What Do Mobile Electrical Diagnostics Include?
Advanced electrical diagnostics and repair. From check engine lights to wiring issues.
OBD-II code diagnostics
Check engine light codes read and traced to the underlying problem.
Wiring harness repair
Damaged wiring and connectors located and repaired.
Alternator & starter service
Charging and starting problems diagnosed and repaired.
Sensor replacement
Faulty sensors identified and replaced.
Can Electrical Diagnostics Be Done at My Location?
Yes. Electrical diagnostics and repairs are performed on-site at your home, office, lot or job site when there's adequate, safe workspace.
Available across Washington, DC (all four quadrants), Maryland (Silver Spring, Bethesda, Rockville, College Park, Bowie, Laurel and more) and Northern Virginia (Arlington, Alexandria, Fairfax, Reston, Tysons, Manassas and more).
Mobile service requires adequate workspace and a suitable area to work safely, such as a flat driveway, parking lot or garage.*
Common Signs You May Need Electrical Diagnostics
These are common signs, not a diagnosis. The cause is confirmed with a hands-on diagnosis before any repair is recommended.
- Check engine light on or flashing
- Vehicle won't start or cranks slowly
- Dim or flickering lights
- Battery warning light
- Intermittent electrical problems
Not sure? Describe what you're noticing when you request a quote.
Photos from Our Work
Electrical and diagnostic service is available for personal vehicles and for company fleets: work vans, pickups, sedans and SUVs, diagnosed at your lot, yard or job site.
Fleet servicesElectrical & Diagnostics FAQ
Still have a question? Call or text (571) 969-4256.
Last updated: October 2026
Yes. OBD-II code diagnostics are done on-site, along with wiring harness repair, alternator and starter service, and sensor replacement, anywhere in our DC, Maryland and Virginia service area.
Yes. Alternator and starter service is part of our electrical and diagnostics work.
Yes. We track down wiring issues and repair wiring harnesses and connectors.
Yes. We diagnose company and fleet vehicles at your lot, yard or job site, so you can decide on next steps without taking the vehicle to a shop.
Related Services
Get a Diagnostics Quote
Call or text (571) 969-4256 or use the form. Tell us your vehicle's year, make and model and what's going on.
Stranded or need urgent repair? Call us now.
Call or text
(571) 969-4256*Mobile Service Disclaimer: Mobile service requires adequate workspace and a suitable area for the technician to safely perform repairs (e.g., a flat driveway, parking lot, or garage). Engine swaps, exhaust work, and other major services cannot be performed as mobile service and require a consultation. We do not offer bodywork, performance upgrades, or coilover installation. Exhaust and custom fabrication services require a prior consultation. My Halo Auto specializes in automotive maintenance and repair, not performance enhancement.