Diesel Diagnostics & Electrical Repair San Antonio

Is your diesel truck showing a check engine light or losing power on the road? Our ASE-certified mechanics in San Antonio offer fast, on-site diesel diagnostics and electrical repair services to keep your truck running strong.

Services List


Preventive & Maintenance
Engine & Drivetrain
AC & Heating
Brakes Repair
Electrical & Diagnostics
EGR & DPF Repair
Fluids & Lubrication
Tire Repair
Bodywork Repair
Fabrication & Welding
Diesel Repair
Towing Services
Transmission & Clutch Repair

24/7 Online support


We offer 24/7 roadside assistance for emergency truck repairs in San Antonio and surrounding areas. Our mobile mechanics are just a phone call away!

+1 (210) 460-1121

info@210truckrepair.com

No.1 Diesel Diagnostics & Electrical Repair San Antonio

When your diesel truck shows warning lights, experiences power loss, or won’t start at all, you need fast service. Our ASE-certified mechanics specialize in diesel diagnostics and truck electrical repair for heavy-duty vehicles, commercial fleets, and semis across San Antonio. Using OEM-grade software and advanced diagnostic tools, we identify and repair issues with your engine, ECM, sensors, or wiring systems on-site.

Diesel Diagnostics & Electrical Repair

210 Truck Repair you’re managing a fleet or operating a single rig, we provide mobile and in-shop electrical diagnostics to keep your truck running strong. 

Onsite Diesel Engine Diagnostic Services in San Antonio

210 Truck Repair provides complete diesel diagnostics to catch issues early, avoid breakdowns, and restore full performance. Our diesel diagnostics include:

  • Full engine code scan and fault isolation
  • DPF, EGR, and DEF system diagnostics
  • ECU and ECM fault logging and resets
  • Cylinder balance and misfire diagnosis
  • Turbo boost pressure and intake sensor checks
  • Exhaust temperature and regen cycle monitoring
  • Fuel system performance testing

Call Now For Diesel Electrical & Diagnostic Repair San Antonio

Don’t let warning lights or electrical faults slow your route. Our mobile team brings expert diagnostics and repairs directly to you anytime, anywhere.

Complete Electrical Repair Services for Diesel Trucks

Our diesel electrical repair services include:

  • Battery load testing and replacements
  • Wiring harness inspection and re-looming
  • ECM, TCM, and ABS module diagnostics
  • Sensor replacements and recalibrations
  • Rewiring for trailer plugs, signal lights, & brakes
  • Alternator output testing and charging system repair
  • Power distribution and fuse panel repairs

Mobile Diesel Diagnostics and Electrical Repair San Antonio

  • Electrical fault detection and repair
  • On-site code scans and system checks
  • Sensor testing and plug-in module diagnostics
  • Fuse, relay, and switch replacement
  • Custom wiring repairs for trailers and fleet vehicles

Emergency Diesel Electrical Repair Services

Stuck with a no-start, stalling, or warning light while hauling a load? We offer 24/7 emergency electrical diagnostics and repairs for heavy-duty diesel trucks in San Antonio. Emergency services include:

  • DEF and DPF sensor error fixes
  • Light and signal failures
  • ECU/TCM error resets and reprogramming
  • Jump-starts and dead battery replacement
  • Emergency trailer wiring repairs

Preventive Electrical System Inspections for Fleets

Avoid costly breakdowns with scheduled diagnostics and electrical system maintenance. We inspect entire fleets on-site and provide real-time reports and service to keep trucks DOT compliant and running clean. Fleet electrical services include:

  • Full diagnostic health reports
  • Sensor calibration and updates
  • Battery, alternator, and starter checks
  • Harness inspections and re-securing
  • Trailer light, brake, and signal system checks
  • CAN bus scan and ECU log pulls

We support contractors, freight companies, government fleets, and private carriers across San Antonio.

Common Truck Electrical Issues We Fix

  • No-crank and intermittent starting
  • Failed sensors and ECM faults
  • Trailer light wiring and signal malfunctions
  • Relay, fuse box, and circuit faults
  • ABS, HVAC, & dash system issues
  • Broken ground wires or damaged harnesses
  • Alternator and battery system failures & issues
  • CAN bus & multiplexing communication problems

Service Area | Diesel Diagnostics Near Me San Antonio

Searching for “Diesel Diagnostics Near Me”? We offer fast-response coverage across San Antonio and nearby areas:

  • Kirby
  • Converse
  • Windcrest
  • Live Oak
  • Schertz
  • Selma
  • Universal City
  • Alamo Heights
  • Downtown San Antonio
  • Leon Valley

Wherever you are across the metro, we arrive in under an hour.

Diesel Diagnostic Reapir Past Work

Client Testimonials | Trusted by San Antonio Truckers

Manny C.

Diesel ECU Diagnosis

“My dash lit up with error codes. They reprogrammed and cleared the ECU onsite. Back to work in under two hours.”

Google Review San Antonio

Leo R.

No‑Start Issue

“Tech replaced the relay and starter right there. Very professional and fast.”

Google Review San Antonio

Dustin J.

Sensor Replacement & Scan

“Replaced faulty sensors that affected idle and shifting. Runs perfect now. Great on-site service.”

Google Review San Antonio

FAQ’s

Yes. We use OEM-level scan tools to read DTC codes, analyze live ECU data, and perform detailed diesel diagnostics on-site.

Absolutely. We carry all necessary parts and tools to repair alternators, starters, wiring, relays, sensors, and charging systems directly on location.

We usually arrive within 30–40 minutes anywhere in San Antonio. Call us 24/7 for immediate roadside or yard diagnostics.