Rio Grande Valley · By appointment

Find the fault.
Keep working.

Mobile diagnostics for trucks, tractors, and heavy equipment in the Rio Grande Valley and South Texas. We use fault scans, live operating data, and targeted testing to help find the cause and guide the repair.

LG Equipment Diagnostics & Repair owner using a diagnostic tablet beside an agricultural tractor
Diagnostic insight, right at your machine.

Vehicles & equipment we service

On the road.
On the job. In the field.

Mobile diagnostics for commercial vehicles, construction equipment and agricultural machinery.

Excavator at a construction siteBy appointment

Off-Highway Diagnostics

Excavators, loaders, skid steers, backhoes, graders, cranes and selected stationary or road-maintenance machines.

  • Engine, hydraulic and control-system faults
  • Sensors, wiring and electrical checks
  • Low power and intermittent problems
Explore heavy equipment diagnostics
Agricultural equipment working in a fieldBy appointment

Agriculture Diagnostics

Tractors, combines, forage and grape harvesters, sprayers, balers and supported implements.

  • Engine and electronic-system faults
  • Tractor-to-implement communication (ISOBUS)
  • Field-performance and operating problems
Explore tractor diagnostics
Blue semi truck and box trailer parked in an open lot at sunsetBy appointment

Commercial Vehicle Diagnostics

Trucks, buses, trailers, work vans and commercial pickups, from one vehicle to a fleet.

  • Engine and transmission faults
  • ABS, braking and trailer systems
  • DPF, DEF and SCR warnings
Explore truck diagnostics

Confirm coverage before scheduling.

Functions vary by make, model, year, controller and connection. Send your equipment details and VIN or serial / PIN plate so we can confirm support.

Ask about coverage

Diagnostic capabilities

A clearer view
of the problem.

Fault scans, live data and targeted tests to guide the next repair.

Fault scans

Read fault codes and identify which systems need attention.

Live operating data

Check sensor readings to understand when and how a fault appears.

Component tests

Test supported components to help pinpoint the cause.

DPF & DEF support

Investigate DPF, DEF and SCR faults; supported regeneration when conditions allow.

Calibrations & resets

Supported sensor calibrations, injector coding and service resets.

Diagnostic reports

Get the findings, checks performed and recommended next steps.

Available functions depend on the vehicle, machine and installed systems.

Repair

On-site work guided by the findings.

Maintenance

Service based on operating hours and maintenance schedules.

Verification

Follow-up scans and checks to assess the repair.

From first message to next steps

Here is how
your visit starts.

Share a few details so we can check coverage and discuss the right next step for your machine.

  1. Tell us what happened

    Send the make, model, year, your city, and the symptoms or fault code. Photos and recent repair history help.

  2. Confirm the visit

    We discuss equipment support, the initial scope, visit cost and travel before agreeing on an appointment.

  3. Understand the findings

    Review the checks performed and what they show. Discuss repair recommendations and any additional work.

A service request does not reserve a time. We will confirm availability and the visit details with you.

Request mobile diagnostics

Tell us what
needs attention.

Share your equipment details and location. Prepare a message here, then review and send it through WhatsApp or email. You can also text us directly.

Rio Grande Valley & South Texas

Serving commercial vehicle owners, fleets, farms, ranches, and construction jobsites in Mission, McAllen, Edinburg, Pharr, Weslaco, and surrounding communities.

Commercial vehicles · Off-highway · Agriculture

Before your visit

How much will the visit cost?

Send your equipment details, symptoms and location for a quote. We discuss the initial diagnostic scope and any travel charge before scheduling. Additional repair work is discussed separately.

Do you come to my farm or jobsite?

Yes. We provide mobile diagnostic service for vehicle owners, fleets, farms, ranches, and construction jobsites across the Rio Grande Valley and surrounding South Texas communities. Send your location so we can discuss the visit.

Can you diagnose my truck, tractor, or machine?

We support commercial vehicles, off-highway equipment, and agricultural machinery. Coverage depends on the make, model, year, controller, and connection. Send the VIN or a photo of the serial / PIN plate so we can confirm support before scheduling.

What should I send with my message?

Include your make, model, year, city or jobsite, and the symptoms or exact fault code. A dashboard photo and any recent repair history help us understand the next step.

Start your request

Send the right details.

Complete the required fields, then choose how to send your message. Nothing is sent by this form.

Your details stay on this page until you choose WhatsApp or email. Add machine photos in your message app.

Prefer a quick text?

956-792-9928info@lgdiag.com

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