Detroit Engine Service & Repair
Expert diagnostics, maintenance, and repair for all Detroit diesel engines at our Sidney and Brookville, Ohio locations
About Detroit Diesel Corporation
Detroit Diesel, a subsidiary of Daimler Trucks North America, manufactures heavy-duty diesel engines known for fuel efficiency and advanced technology. Their engines power Freightliner, Western Star, and Thomas Built buses.
Headquarters:
Detroit, Michigan, USA
Founded:
1938
Specialties:
Detroit Engine Models We Service
DD15
Applications:
- Long-haul trucks
- Heavy-duty vocational
DD13
Applications:
- Regional haul
- Vocational trucks
DD16
Applications:
- Severe-duty trucks
- Heavy haul
DD8
Applications:
- Medium-duty trucks
- Vocational
DD5
Applications:
- Medium-duty trucks
- Box trucks
Common Detroit Fault Codes
SPN 4364 FMI 18
SCR NOx Conversion Efficiency Low
Symptoms:
- Engine derate
- Increased DEF consumption
- Poor performance
Possible Causes:
- Bad DEF quality
- SCR catalyst failure
- NOx sensor issue
SPN 3361 FMI 7
DEF Dosing Unit - Mechanical System Not Responding
Symptoms:
- No DEF injection
- High NOx emissions
- Engine derate
Possible Causes:
- DEF pump failure
- Clogged DEF injector
- Wiring problem
SPN 411 FMI 3
EGR Valve Position - Voltage Above Normal
Symptoms:
- Rough idle
- Black smoke
- Power loss
Possible Causes:
- EGR valve stuck
- Wiring short
- ECM issue
SPN 3719 FMI 16
DPF Soot Load Very High
Symptoms:
- Frequent regen requests
- High exhaust temps
- Reduced power
Possible Causes:
- Driving pattern
- Faulty sensors
- DPF restriction
Experiencing a fault code? Our certified technicians can diagnose and repair any Detroit engine issue.
Get Diagnostic HelpDetroit Maintenance Schedule
Oil & Filter Change
Every 35,000-50,000 miles
Use Detroit-approved DFS 93K222 oil specification
Fuel Filter Replacement
Every 25,000-50,000 miles
Replace primary and secondary filters together
DPF Ash Cleaning
Every 300,000-500,000 miles
Remove accumulated ash that cannot be burned off
Overhead Adjustment
Every 160,000 miles
Adjust valves, injectors, and engine brake
Air Filter Replacement
Every As indicated by restriction gauge
Monitor restriction indicator, replace when in red zone
Coolant Analysis
Every 100,000 miles or annually
Test for freeze point, pH, and contamination
Detroit Emission Systems
DPF System
Advanced DPF with active regeneration management
Maintenance Tips:
- Monitor regen frequency
- Avoid interrupting active regens
- Use only ultra-low sulfur diesel
- Schedule periodic ash cleaning
Common Issues:
- Excessive regen frequency
- Incomplete regenerations
- DPF face plugging
- Temperature sensor failures
SCR System
BlueTec SCR system for NOx reduction
Maintenance Tips:
- Use certified DEF only
- Check for DEF crystallization
- Inspect dosing injector regularly
- Monitor NOx sensor readings
Common Issues:
- DEF pump failures
- Dosing valve sticking
- NOx sensor contamination
- DEF quality sensor faults
DEF System
Diesel Exhaust Fluid system with heated lines and tank
Maintenance Tips:
- Keep DEF fresh (1 year shelf life)
- Check heater operation in winter
- Never mix with other fluids
- Inspect tank for contamination
Common Issues:
- Heater element failures
- Tank level sensor issues
- Line crystallization
- Header tank cracks
Expert Detroit Engine Service at Two Convenient Locations
With over 15 years of experience, Wayne Truck & Trailer is your trusted partner for all Detroit engine repairs and maintenance.
Serving Sidney, Brookville, Dayton, Piqua, Troy, Bellefontaine, and surrounding areas