Truck Computer Diagnostics & Repair Throughout The Balmorhea, Pecos, and Van Horn Area

Get Back on the Road Faster — With Pinpoint Accuracy

Modern diesel trucks are more than pieces of machinery, they are complex computer systems. They utilize a large system of sensors, wires, and computers to monitor and control everything throughout the vehicle. This includes but is not limited to the transmission, emissions systems, braking system, and all electronics on board. At Big Country Truck & Trailer, LLC, our certified diesel mechanics use state-of-the-art diagnostic tools and software to read fault codes, monitor systems, and quickly identify the root cause of any issue.


Whether your truck is showing a warning light or acting sluggish, we don’t guess — we diagnose precisely, then repair efficiently.

What We Diagnose

Our comprehensive diagnostics cover:


  • Engine & Emissions Systems — detect fuel-system irregularities, turbocharger problems, glow-plug or injection issues, emission-control faults and more.
  • Transmission & Drivetrain — catch issues with shifting, transmission sensors, drivetrain communications, or clutch/gearbox problems.
  • Electrical / Electronic Systems — identify alternator failures, battery or wiring issues, sensor failures, wiring-harness faults, and electrical gremlins.
  • Brake, Air & Safety Systems — spot air-system leaks, ABS or brake-system sensor faults, and other safety-critical issues before they become a breakdown. 

Why Truck Computer Diagnostics Matter

  • Faster — Downtime means lost money. Our computer diagnostics don’t waste precious time and money guessing what the issue is, it tells us exactly what’s wrong. That means a quick & proper fix and less downtime.


  • More Accurate — Smarter Repairs: Diagnostic Trouble Codes (DTCs) map to specific systems and sensors, allowing our diesel mechanics to zero determine where the problem is.


  • Cost-Effective & Preventive: Routinely scanning your truck allows you to catch any issues — even before they trigger a warning light — and prevent costly breakdowns down the road.


  • Full Coverage — From Engine to Emissions to Electronics: Trucks are interconnected systems. We’re equipped to diagnose and repair engine, transmission, exhaust, emission-control, electrical, and safety systems. 

How It Works — Diagnostics Process at Big Country

  • Connect & Scan — We plug a diagnostic tool into your truck’s data port (OBD / ECM / diagnostic connector) and run a full scan.
  • Read & Analyze — The tool pulls Diagnostic Trouble Codes and live-data logs (engine, transmission, emissions, sensors, etc.). Our techs interpret this data to locate the fault.
  • Diagnose & Report — We identify the root cause, explain what’s wrong, and recommend the right repairs — no guesswork, no unnecessary parts.
  • Repair & Retest — Once repairs are completed, we run another diagnostic scan to verify the fix and ensure the system is operating properly.
  • Back on the Road — With the problem solved, your truck returns to service with restored reliability and performance.

When to Schedule Diagnostics

  • Warning lights or error codes — don’t ignore them.
  • Rough idling, power loss, or performance issues.
  • Unexpected fuel consumption, exhaust, or emissions problems.
  • Electrical or wiring issues — flickering lights, sensor errors, starting problems.
  • Before long hauls — a pre-trip diagnostic scan can catch hidden problems before they become costly breakdowns.

Why Choose Big Country Truck & Trailer Service

  • Experienced Technicians — Our team of diesel technicians in the Pecos, TX area are familiar with modern diesel computers, heavy-duty ECU systems, and complex wiring architectures. We have seen and handled all types of computer diagnostic repairs.
  • State-of-the-Art Tools — Modern trucks and trailers require modern technology to repair. At Big Country Truck & Trailer Service, LLC we invest in up-to-date diagnostic scanners and software to handle all makes and models of trucks.
  • Full-Service Repairs — Diagnostics is just the start, our team of diesel mechanics will use the information gained from the diagnostics and perform the repair as well. Engine, transmission, brake, and electrical issues can all be fixed at Big Country Truck & Trailer Service, LLC.
  • Fast, Dependable Service — Whether it’s a shop visit or emergency roadside repair, we aim for quick, reliable, and honest service so you get back on the road ASAP.

Ready to Diagnose?

If your truck is acting up — from warning lights to performance issues — don’t wait. Bring it to Big Country Truck & Trailer Service, LLC and let us pinpoint the problem with precision diagnostics.


Call us now at (432) 940-3073 or Request Service Online to schedule your diagnostic appointment. Let’s get you back on the road with confidence.