Onecall Roadside Repair Logo
Mobile heavy-duty truck repair service truck on an Ontario highway shoulder in daylight
Heavy-Duty Only

24/7 Mobile Truck Repair GTA & Highway 401 Roadside Mechanic Services

Full-scope mobile repair for commercial semi-trucks, trailers, and heavy fleets — dispatched 24/7 to your location across the GTA and Ontario's 401, 400, QEW and 407 corridors.

Mobile diesel mechanic performing engine diagnostics on a heavy-duty truck with hood tilted forward

Mobile Truck Repair

Engine, brake, suspension and powertrain repair performed on-site, anywhere in our coverage area.

  • βœ” Brake & air system repair
  • βœ” Suspension & steering repair
  • βœ” Powertrain & drivetrain repair
πŸ“ž Dispatch Now for This Service
Technician servicing an open Thermo King reefer control panel on a trailer

Trailer Repair & Emergency Reefer Service Ontario

Structural and mechanical repair for dry van, reefer, flatbed and specialty trailers.

  • βœ” Landing gear & door repair
  • βœ” Lighting & electrical systems
  • βœ” Air system leak repair & reefer refrigeration diagnostics
πŸ“ž Dispatch Now for This Service
Roadside commercial tire and rim service, Commercial Tire Swap QEW

Tire & Blowout Repair — Commercial Tire Swap QEW

Rapid on-site mounting, balancing and blowout response for commercial drive, steer and trailer tires.

  • βœ” Scheduled preventive inspections
  • βœ” DOT/safety compliance checks
  • βœ” Fleet-wide air system checkups
πŸ“ž Dispatch Now for This Service
Commercial vehicle OBD diagnostic tablet, DPF Regen Highway 400

Diesel Diagnostics & DPF Regen Highway 400

Dealer-level computer diagnostics to get you back on the road with a confirmed fix, not a guess.

  • βœ” Forced regens & code clearing
  • βœ” Parameter adjustments
  • βœ” Electrical & battery diagnostics
πŸ“ž Dispatch Now for This Service
Show Up Prepared

Mobile Fleet Equipment & Diagnostic Capabilities

Every dispatch truck carries dealer-level tooling, not a basic roadside kit.

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Dealer-Level Heavy Computer Diagnostics

Forced regens, parameter adjustments and fault code clearing across major heavy-duty engine platforms.

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Commercial Mobile Tire Equipment

On-site mounting, balancing and inflation for heavy commercial drive, steer and trailer tires.

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Air System Pressurization & Leak Detection

Full air brake system pressure testing and leak detection performed roadside.

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Heavy Electrical & Battery Diagnostics

Full electrical system and battery/starting diagnostics for commercial trucks and trailers.

Real Jobs, Real Trucks

On The Job

A look at our technicians working roadside and on-site across Ontario.

Roadside dual-tire replacement on a tanker trailer, Ontario highway shoulder
Pneumatic impact wrench servicing trailer tandem wheels roadside
Open Thermo King reefer control panel diagnostics at a logistics yard
Mobile mechanic service truck dispatched to heavy equipment on a lowboy trailer
Technician servicing tanker semi-trailer tandem wheels roadside
Technician inspecting a dump truck hydraulic hoist and ram
Technician running OBD computer diagnostics on a box truck engine
24/7 roadside dispatch truck servicing a lowboy-trailer excavator
Quick Reference

Common Fault Code (DTC) Quick Lookup

Select a fault category to see what it usually means and how a mobile technician approaches it.

Select a fault category above to see what it usually means and how a mobile technician would approach it.

Frequently Asked Questions

Common Questions From Drivers & Fleets

No. Onecall Roadside Repair is dedicated exclusively to heavy-duty commercial semi-trucks, commercial trailers, and fleet equipment β€” we don't service passenger vehicles or provide standard towing, truck sales, leasing, or rental.

Typical arrival windows across the GTA and core Ontario corridors run 30-45 minutes, depending on your exact location, time of day, and traffic conditions. Call as soon as you're safely stopped so dispatch can start routing a technician immediately.

Yes. Our mobile units carry dealer-level diagnostic equipment for forced DPF/DEF regenerations, ABS and air system fault tracing, and reefer refrigeration diagnostics, so most fault codes can be resolved without a shop visit.

Yes, registered fleet accounts can be set up with direct corporate Net-30 invoicing, and we accept major fleet cards including Comdata and EFS for roadside authorization.

Your exact highway marker or location, your unit number and truck/trailer make, and a description of the specific issue (tire blowout, air brake leak, engine code/regen, battery/electrical, etc.) β€” this lets us dispatch the right technician with the right parts on the first trip.

πŸ“ž Call Dispatch πŸ’¬ Text Dispatch