Mon–Fri 7 AM–6 PM · Sat 7 AM–2 PM · 315 E Pioneer St, Phoenix LEAVE US A REVIEW ★

Detroit Diesel Engine Repair

Detroit engines power most Freightliner and Western Star trucks on the road. Emergency Roadside Truck & Trailer Repair repairs Detroit engines and the DT12 transmission in Phoenix.

Detroit Engines We Service

  • DD13, DD15 and DD16
  • DD5 and DD8 medium-duty
  • Series 60 (older trucks)

Common Detroit Repairs

  • One-box aftertreatment — DPF, DEF and NOx faults.
  • EGR valve, cooler and sensors.
  • Turbocharger and boost problems.
  • Fuel system and injectors.
  • Cooling system leaks.
  • DT12 transmission faults.
  • Engine brake issues.

See also Freightliner repair and diesel truck repair.

Detroit One-Box Aftertreatment

Many Detroit-powered trucks use a one-box aftertreatment system combining the DOC, DPF and SCR. When it has problems, the truck can derate quickly. We diagnose DEF dosing, sensor and DPF problems and perform regenerations with diagnostic software.

Older Series 60 Engines

We still see Series 60 engines in older trucks and equipment and repair them as well.

Truck down or need service? Mon–Fri 7 AM–6 PM · Sat 7 AM–2 PM

📞 Call (480) 932-4860

Frequently Asked Questions

Do you repair Detroit DD15 engines?+

Yes, along with DD13, DD16, DD5, DD8 and the older Series 60.

Do you repair Detroit one-box aftertreatment?+

Yes — DPF, DEF and sensor faults on the one-box system.

Do you service DT12 transmissions?+

Yes, including clutch actuators and shifting faults.

Can you do a parked regen on a Detroit?+

Yes, when conditions allow, we can perform parked regenerations with diagnostic software.

Where can I bring my Detroit for service?+

Bring your Detroit to our shop at 315 E Pioneer St, Phoenix, AZ 85040, or call (480) 932-4860 for a mobile mechanic.

Truck Down in Phoenix? Call Now.

Our mobile mechanics are standing by — we come to your location anywhere in the Phoenix metro.

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