Kenworth Engine Service & Repair
Expert diagnostics, maintenance, and repair for all Kenworth diesel engines at our Sidney and Brookville, Ohio locations
About Kenworth Truck Company
Kenworth Truck Company manufactures medium and heavy-duty Class 8 trucks. Known for their quality, durability, and driver comfort, Kenworth trucks are powered by PACCAR MX engines and are widely used in long-haul, vocational, and construction applications across North America.
Headquarters:
Kirkland, Washington, USA
Founded:
1923
Specialties:
Kenworth Engine Models We Service
PACCAR MX-13
Applications:
- Long-haul trucks
- Regional haul
- Vocational
PACCAR MX-11
Applications:
- Regional haul
- Vocational
- Weight-sensitive
Cummins X15
Applications:
- Heavy-duty trucks
- Heavy haul
Cummins ISX15
Applications:
- Heavy-duty trucks
- Vocational
Common Kenworth Fault Codes
P1515
EGR Differential Pressure Sensor Circuit
Symptoms:
- Reduced power
- Rough idle
- Black smoke
Possible Causes:
- Faulty pressure sensor
- Clogged EGR cooler
- Wiring issue
P244B
DPF Differential Pressure Too High
Symptoms:
- Frequent regenerations
- Power loss
- High fuel consumption
Possible Causes:
- Restricted DPF
- Faulty sensors
- Exhaust leak
P20EE
SCR NOx Catalyst Efficiency Below Threshold
Symptoms:
- Engine derate
- Emissions warning
- DEF consumption high
Possible Causes:
- Bad DEF
- SCR catalyst damage
- Injector problems
SPN 3597 FMI 2
EGR Valve Controller - Data Erratic
Symptoms:
- Reduced power
- Black smoke
- Poor fuel economy
Possible Causes:
- Faulty EGR valve
- Wiring issues
- ECM problem
Experiencing a fault code? Our certified technicians can diagnose and repair any Kenworth engine issue.
Get Diagnostic HelpKenworth Maintenance Schedule
Oil & Filter Change
Every 40,000-60,000 miles
Use PACCAR approved low-ash engine oil for MX engines
Fuel Filter Service
Every 40,000-60,000 miles
Replace both fuel filters and water separator
Valve Adjustment
Every 150,000-200,000 miles
Adjust intake/exhaust valves and injectors
DPF Service
Every 250,000-400,000 miles
Professional cleaning to remove accumulated ash
Coolant System Flush
Every 300,000 miles
Complete system flush with OAT coolant
Transmission Service
Every 250,000-500,000 miles
Fluid and filter change for manual or automated transmissions
Kenworth Emission Systems
DPF System
PACCAR DPF with intelligent regeneration control
Maintenance Tips:
- Allow complete regeneration cycles
- Monitor backpressure readings
- Use recommended engine oil
- Avoid excessive idle time
Common Issues:
- Incomplete regenerations
- Sensor failures
- Face plugging from oil consumption
- Cracked filter substrate
SCR System
Advanced SCR with twin dosing for optimal NOx reduction
Maintenance Tips:
- Use ISO 22241 compliant DEF
- Check injector for buildup
- Monitor catalyst efficiency
- Replace filters as scheduled
Common Issues:
- DEF injector clogging
- Pump module failures
- NOx sensor drift
- Catalyst contamination
DEF System
Heated DEF system with quality monitoring
Maintenance Tips:
- Maintain proper DEF levels
- Check heating elements seasonally
- Use clean filling equipment
- Monitor for contamination
Common Issues:
- Level sensor failures
- Heater malfunctions
- Quality sensor faults
- Tank contamination
Expert Kenworth Engine Service at Two Convenient Locations
With over 15 years of experience, Wayne Truck & Trailer is your trusted partner for all Kenworth engine repairs and maintenance.
Serving Sidney, Brookville, Dayton, Piqua, Troy, Bellefontaine, and surrounding areas