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Licensed & Insured · Maryland · 24/7 dispatch · (240) 780-8691

Mobile Diesel Mechanic in Maryland — DPF, Derate, No-Start & Truck Road Service

Truck down on the highway, yard, or job site? Priority Towing and Recovery & Heavy Duty Semi Truck Wrecker, Inc. sends a mobile diesel mechanic to you — from Randallstown, Columbia, Baltimore, and Westminster. We fix it where it sits when we can. If it cannot roll, the same ticket escalates to our owned heavy wreckers.

Call (240) 780-8691 Request Fleet Quote

What we handle on site

Commercial diesel only — tractors, reefers, box trucks, and medium-duty equipment. We do not offer general auto repair.

  • Dealer-level diagnostics — read codes on the shoulder and decide repair vs. tow.
  • DPF regenerations & derate clears — forced regens and derate resets so the unit can pull legally.
  • No-starts, jumps & charging — batteries, alternators, starters, and electrical that keep the truck running.
  • Air brakes & wheel ends — air-system and wheel-end work that can avoid an unnecessary tow.
  • Roadside truck repair — parts and labor on the unit when a safe return to service is possible.
  • Same-company recovery — if it cannot be made safe, we send our heavy wreckers, Landoll, or RGN.

Unit down right now?

Tell dispatch the unit type, mile marker or address, and any codes you have. One number for mobile diesel and heavy recovery.

Call (240) 780-8691 Heavy duty towing

DPF derate, DEF faults & truck no-start repair

Truck derated, throwing a DPF or DEF fault, or won’t start? Our mobile diesel mechanic reads the codes where the truck sits, performs forced DPF regenerations and derate clears when the unit can be made safe and legal, and works no-start, charging and electrical problems on the spot. Call (240) 780-8691.

  • Derate & DPF/DEF faults — diagnosis, forced regens and derate clears on site.
  • Diesel truck won’t start — batteries, alternators, starters and electrical checked at your yard or roadside.

More detail: DPF derate repair — we repair and restore proper emissions systems (no delete tuning).

Truck road service in Columbia, Baltimore & across Maryland

Semi or heavy truck down on the road? Our mobile mechanic comes to you for roadside truck repair, air-line and brake work, and breakdown diagnostics — 24/7. If it cannot be fixed safely on site, the same dispatcher sends our owned heavy wreckers. Priority Towing and Recovery & Heavy Duty Semi Truck Wrecker, Inc. is licensed and insured.

Columbia (Howard County) · Baltimore · full Maryland service area

More detail: mobile truck road service — diagnosis, tires, jumps, air brake and fuel issues, with heavy-duty tow handoff.

How it works

  1. Call dispatch

    Call (240) 780-8691 any hour. Share location, unit type, and symptoms or codes.

  2. Tech rolls to you

    We dispatch a mobile diesel mechanic from the closest of our four Maryland locations.

  3. Repair or recover

    We repair in place when safe. If not, the same ticket brings our owned heavy equipment — or shop work at Randallstown.

On-site mobile diesel repair

Our branded mobile diesel vans roll to the yard, highway, or job site with dealer-level diagnostics. Same company ticket if the unit needs a heavy wrecker or Randallstown bay work.

Priority Towing mobile diesel repair van with company wrap Mobile diesel mechanic van next to a semi with hood up
Diesel technician with diagnostic tablet at the truck cab Technician working dashboard diagnostics inside a commercial truck Priority mobile repair van behind a semi with hood open
Two Priority diesel technicians diagnosing a commercial truck roadside

Service area · four dispatch points

Mobile diesel is available from every Priority location. Facility (shop) diesel truck repairs remain Randallstown only at 9325 Liberty Rd — a backup path when bay work is required, not the hero offer on this page.

Need bay work after the roadside call? We can route the truck to the Randallstown diesel shop on the same company ticket.

Mobile diesel FAQ

Do you come to my truck?

Yes. A mobile diesel mechanic is dispatched to the highway, yard, or job site from Randallstown, Columbia, Baltimore, or Westminster — whichever is closest.

What trucks do you work on?

Commercial diesel equipment: tractors, reefers, box trucks, and medium-duty diesels. We do not market passenger-car auto repair.

Can you clear a derate or do a DPF regen roadside?

Yes — dealer-level diagnostics, forced DPF regenerations, and derate clears are routine when the unit can be made safe and legal on site.

What if the truck cannot be fixed on the shoulder?

We do not leave you waiting on a brokered second company. The same dispatcher can send our heavy wreckers, Landoll, or RGN, or bring the unit to the Randallstown shop.

Where is shop diesel available?

Facility diesel truck repairs are Randallstown only at 9325 Liberty Rd. Mobile diesel rolls from all four locations.

Are you open overnight and weekends?

Dispatch is 24/7. Call (240) 780-8691 any hour for mobile diesel or heavy recovery.

Do you repair DPF derates and no-start trucks on site?

Yes. Our mobile diesel mechanic diagnoses DPF and DEF faults, performs forced regens and derate clears, and works no-start and electrical problems where the truck sits. Call (240) 780-8691, 24/7.

Call for mobile diesel · Maryland

Priority Towing and Recovery & Heavy Duty Semi Truck Wrecker, Inc. — one call for the tech and the iron. Fleet accounts: request a quote online; urgent breakdowns should call.

Call (240) 780-8691 Request Fleet Quote Heavy duty towing & recovery