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Sidney:(937) 658-9412
Brookville (Dayton):(937) 991-3050

PACCAR Engine Service & Repair

Expert diagnostics, maintenance, and repair for all PACCAR diesel engines at our Sidney and Brookville, Ohio locations

About PACCAR Inc.

PACCAR manufactures premium diesel engines under the PACCAR name, powering Kenworth and Peterbilt trucks. Known for fuel efficiency, reliability, and advanced technology, PACCAR engines are designed specifically for their truck applications.

Headquarters:

Bellevue, Washington, USA

Founded:

1905

Specialties:

MX Series EnginesIntegrated PowertrainsFuel EfficiencyProprietary Technology

PACCAR Engine Models We Service

MX-13

Displacement:12.9L
Power:380-510 HP
Torque:1450-1850 lb-ft
Years:2010-present

Applications:

  • Long-haul trucks
  • Regional haul
  • Vocational

MX-11

Displacement:10.8L
Power:335-445 HP
Torque:1250-1700 lb-ft
Years:2016-present

Applications:

  • Regional haul
  • Vocational
  • Weight-sensitive

PX-9

Displacement:8.9L
Power:260-450 HP
Torque:720-1250 lb-ft
Years:2007-present

Applications:

  • Medium-duty
  • Vocational
  • Refuse

PX-7

Displacement:6.7L
Power:200-360 HP
Torque:520-800 lb-ft
Years:2007-present

Applications:

  • Medium-duty
  • Delivery
  • Utility

Common PACCAR 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

P0404

EGR Circuit Range/Performance

Symptoms:

  • Rough running
  • Emissions issues
  • Power reduction

Possible Causes:

  • Stuck EGR valve
  • Carbon buildup
  • Actuator failure

Experiencing a fault code? Our certified technicians can diagnose and repair any PACCAR engine issue.

Get Diagnostic Help

PACCAR Maintenance Schedule

Oil & Filter Change

Every 40,000-60,000 miles

Use PACCAR approved low-ash engine oil

Critical

Fuel Filter Service

Every 40,000-60,000 miles

Replace both fuel filters and water separator

Critical

Valve Adjustment

Every 150,000-200,000 miles

Adjust intake/exhaust valves and injectors

Critical

DPF Service

Every 250,000-400,000 miles

Professional cleaning to remove accumulated ash

Recommended

Coolant System Flush

Every 300,000 miles

Complete system flush with OAT coolant

Critical

Air Dryer Service

Every 100,000 miles

Replace desiccant cartridge and check valves

Recommended

PACCAR 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 PACCAR Engine Service at Two Convenient Locations

With over 15 years of experience, Wayne Truck & Trailer is your trusted partner for all PACCAR engine repairs and maintenance.

Sidney Location

2151 S Vandemark Rd

Sidney, OH 45365

Call (937) 658-9412

Brookville Location

6455 Brookville Salem Rd

Brookville, OH 45309

Call (937) 991-3050

Serving Sidney, Brookville, Dayton, Piqua, Troy, Bellefontaine, and surrounding areas