Diesel Engine
Diagnostics & Repair
Professional-grade diesel engine diagnostics using the latest scan tools — performed on-site at your location. We identify fault codes, diagnose the root cause, and repair on the spot. Gilbert, Chandler, Mesa, Phoenix, Glendale, Goodyear, Avondale, Buckeye, Queen Creek, Eloy, and all surrounding areas.
On-Site Engine Services
ECM / ECU Diagnostic Scanning
Full fault code retrieval and interpretation across all major diesel platforms — Cummins, Detroit, PACCAR MX, Volvo D-Series, Mack MP, and more.
Fuel System Diagnosis & Repair
Injector testing, high-pressure fuel pump diagnosis, fuel filter service, and fuel delivery issues resolved on-site.
Turbocharger Inspection & Service
Boost pressure testing, wastegate inspection, and turbo-related fault diagnosis without pulling the truck to a shop.
Cooling System Repairs
Overheating diagnosis, thermostat replacement, coolant leaks, water pump assessment, and radiator hose repairs.
DPF / DEF / Emissions Systems
Diesel particulate filter faults, DEF system issues, SCR catalyst codes — diagnosed and addressed on location.
Injector & Pump Service
Injector balance testing, return line diagnosis, and injection pump assessment for common rail and unit injector systems.
No Tow. No Shop Wait.
Every hour your truck sits waiting for a tow is money out of your pocket. Road Wrench brings the diagnostic equipment and parts directly to your location — on the highway shoulder, at a rest stop, or at your yard.
- Immediate dispatch, 24/7
- OEM-grade diagnostic scan tools
- Deep parts inventory on board
- Most repairs completed on-site
- Gilbert, Chandler, Mesa, Phoenix, Glendale, Goodyear, Avondale, Buckeye, Queen Creek, Eloy & Phoenix Metro
Engine Light On?
We Diagnose On-Site.
Call Road Wrench for immediate dispatch — Gilbert, Chandler, Mesa, Phoenix, Glendale, Goodyear, Avondale, Buckeye, Queen Creek, Eloy, and all surrounding areas.