Diesel Engine Diagnostics for Cummins, Paccar, Volvo & Detroit 

When your check engine light comes on or your truck’s performance drops, don’t guess—get expert diesel engine diagnostics at McCurdy’s Truck Repair in Corning, CA. We specialize in pinpointing and resolving engine issues for Cummins, Paccar, Volvo, and Detroit Diesel engines. Our team uses dealer-level diagnostic tools to find faults fast and fix them right the first time. Call us at 530‑824‑3810 to schedule advanced diagnostics and avoid costly downtime.

Full-Service Diesel Engine Diagnostics You Can Trust

Modern diesel engines are complex systems powered by electronics, sensors, and advanced emissions controls. At McCurdy’s, we use state-of-the-art diagnostic scanners to communicate directly with your truck’s ECM (Engine Control Module) and pinpoint real issues—no guesswork involved.

We provide full diagnostics for:

  • Engine fault codes.
  • Performance issues.
  • Misfires & fuel system problems.
  • Turbocharger & boost diagnostics.
  • Aftertreatment systems (DPF, DEF, SCR).
  • EGR system testing.
  • Sensor calibration & replacement.
  • Regeneration failures & DOC issues.

Whether you're experiencing low power, rough idle, excessive smoke, or warning lights, we’ll track it down and get your rig back on the road.

Specializing in Leading Diesel Engine Brands

At McCurdy’s, we focus on four of the most common and reliable diesel engines on the road. Our technicians receive ongoing training and use brand-specific tools for accurate diagnosis and efficient repairs.

Cummins Engine Diagnostics

From ISX to X15, Cummins engines are known for durability—but when problems occur, they require specialized service. We perform diagnostics on:

  • EGR & DPF systems.
  • Injector balance rates.
  • Turbo actuator calibration.
  • ECM software faults.
  • SCR & DEF systems.

Paccar MX Engine Diagnostics

Paccar’s MX-11 and MX-13 engines are highly advanced, requiring deep diagnostic knowledge. We handle:

  • Fuel system codes.
  • Variable geometry turbo (VGT) faults.
  • Regeneration & DEF issues.
  • Sensor malfunctions.
  • Oil pressure and coolant faults.

Volvo Engine Diagnostics

Volvo’s D11, D13, and D16 engines are equipped with advanced emissions technology. Our diagnostics include:

  • VGT turbo and EGR valve testing.
  • Electronic unit injectors.
  • Diesel particulate filter performance.
  • Onboard SCR diagnostics.

Detroit Diesel Diagnostics

Whether it’s a DD13, DD15, or DD16, we’re ready to keep your Detroit engine in top shape. Diagnostics include:

  • Fuel rail pressure & injection timing.
  • Turbo boost & actuator performance.
  • DPF regeneration cycles.
  • EGR cooler & valve performance.
  • Electrical system & communication errors.

Don’t Ignore Your Check Engine Light

A check engine light or engine warning indicator is your truck’s way of saying, “Something’s wrong.” Continuing to drive without diagnostics can lead to:

  • Severe engine damage.
  • DPF clogging or failure.
  • Emissions violations.
  • Increased fuel consumption.
  • Risk of roadside breakdown.

Bring your truck to McCurdy’s in Corning, CA, for an engine scan and a full report. We’ll tell you what’s wrong, what it will take to fix, and how long it will take—with honest, upfront pricing.

Onsite Repairs After Diagnostics

Once we identify the issue, our technicians are equipped to handle most repairs on-site—the same day in many cases. Services following diagnostics may include:

  • Injector replacement.
  • Turbo system repairs.
  • Sensor replacements.
  • Wiring harness repair.
  • EGR & DPF cleaning.
  • ECM updates or replacement.
  • Gasket and seal replacements.

We keep many common engine components in stock to minimize your downtime.

Preventive Maintenance with Diagnostics

We also offer preventive diagnostics as part of our fleet maintenance services. This helps you:

✅ Catch small issues before they grow.
✅ Monitor injector balance and fuel trims.
✅ Track regen cycles and DPF load.
✅ Check cooling system performance.
✅ Reduce unscheduled breakdowns.

Our diagnostic checks are a smart investment, especially for fleets focused on uptime.

Serving Drivers and Fleets in Corning, CA, and Beyond

McCurdy’s Truck Repair proudly serves truckers across Tehama, Glenn, Butte, and Shasta counties. Whether you’re a:

  • Long-haul driver.
  • Regional fleet operator.
  • Local agricultural hauler.
  • Construction fleet owner.

—We’re here to keep your engines running clean, strong, and compliant.

Get Accurate Diesel Engine Diagnostics in Corning, CA

Don’t leave your truck’s health to chance. Trust the experts at McCurdy’s Truck Repair for precise diesel engine diagnostics on Cummins, Paccar, Volvo, and Detroit engines. With the right tools and years of experience, we’ll get to the root of the issue fast and fix it right. Call  530‑824‑3810 to schedule your diagnostic service.