COMPUTER DIAGNOSTICS

COMPUTER DIAGNOSTICS, CHECK & CLEAR CODES. DEF, DPF, AND NOx SERVICE

  • Full OEM-level scan of engine and emission control modules.

  • Read and interpret fault codes, freeze-frame data, and live sensor readings.

  • Clear codes after repairs and verify no recurrence with road testing.

  • Detailed diagnostic report with recommended repairs and cost estimate.

REGEN (REGENERATION) SERVICE

  • Forced regen to safely burn off DPF soot when passive regen is not possible.

  • Verify regen system components: turbo, EGR, temperature sensors.

  • Post-regeneration verification to ensure soot levels are reduced, and regen completes properly.

SCR, DEF PUMP & DOSER

  • Inspect and test selective catalytic reduction (SCR) system components.

  • Test DEF pump operation, dosing unit functionality, and actuator response.

  • Replace or service doser assemblies and check DEF quality and level.

  • Address crystallization, injector clogging, and dosing Calibration faults.

NOx SENSORS

  • Test NOx sensor accuracy and response time using live data comparisons.

  • Replace failed or slow sensors; perform post-replacement programming/calibration as required.

  • Verify SCR system performance with functional NOx readings.

DPF FILTER & SENSORS

  • Inspect DPF for soot load and physical condition.

  • Test differential pressure sensors, temperature sensors, and soot accumulation sensors.

  • Perform cleaning procedures when feasible, or recommend DPF replacement if damaged or saturated.

  • Confirm DPF regeneration controls function and that backpressure remains within spec.

TEMPERATURE & PRESSURE SENSORS

  • Diagnose faulty coolant, exhaust gas, and intake air temperature sensors.

  • Replace and calibrate sensors; recheck system performance and error code resolution.

7TH INJECTION CLEANING

  • Perform targeted cleaning of the 7th cylinder injector (diesel doser) area and related intake/EGR passages when applicable.

  • Use manufacturer-recommended cleaning agents and procedures to remove deposits that affect combustion and regeneration.

  • Verify injector performance via regeneration

WHY JB FLEET MANAGEMENT

  • Mobile truck service and on-site diagnostics to minimize downtime.

  • Trained technicians with OEM diagnostic tools and experience in heavy-duty diesel emission systems.

  • Clear, professional reports and transparent recommendations for repair or replacement.

  • Emphasis on safety, emissions compliance, and long-term fleet uptime.

Contact JB Fleet Management to schedule a diagnostic inspection and get a precise repair plan tailored to your truck’s make and model.

CHANGE PARAMETERS

CHANGE SPEED, CRUISE CONTROL SPEED, IDLE, TRANSMISSION SETTINGS, AND MUCH MORE

DPF FILTER SERVICE

REMOVE AND INSPECT DPF FILTERS. INSTALL NEW, REMAND, OR GET THEM CLEANED OUT.

CHECK AND CLEAR CODES

CHECK CODES, COUNT, AND TIME OF EVENT. HELP WITH DIAGNOSIS AND CLEAR CODES.

DEF PUMP, FILTER, AND DOSER

CHECK DEF QUALITY AND QUANTITY. FILTER AND PUMP SERVICE, AND REPLACEMENT. DOSER SERVICE, AND REPLACEMENT.

REGEN AND SCR

RUN REGEN AND SCR TEST. CHECK THE PERFORMANCE OF EMISSIONS SYSTEMS, AND THE HEALTH OF ONE BOX.

NOx SENSOR

REPLACE AND SERVICE NOx, TEMPERATURE, AND PRESSURE SENSOR