IK1201501
Service Bulletin/Repair Instructions
The purpose of this document is to properly identify and repair a leak at the rear gear housing boss.
Vehicle report
2023 INTERNATIONAL LT
Service bulletins
111 bulletinsTechnical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
IK1201526
Service Bulletin/Repair Instructions
This document will guide the user through the parts and information related to A26B resonator removal and EGR cross-over tube installation.
IK1201506
Service Bulletin/Repair Instructions
This document will guide the user through to inspect A26 turbochargers remanufactured by SRC between 05/01/2023 and 02/01/2025. SRC Turbochargers assembled with new compressor housings may have a defect that prevents the TCOT sensor (Part# 1845988C1, Sensor, Exhaust Gas Temp) from being installed correctly.
IK4300031
Service Bulletin/Repair Instructions
This document will provide information regarding certain approved S13 and T14 chemicals.
IK0800560
Service Bulletin/Repair Instructions
This document will guide the user through the changes of the dielectric grease/coatings used in certain areas on all International vehicles built after 1/8/2018. International's Electrical Engineering Team made this change to improve the longevity of the OEM coatings and to improve applications at the factory.
26101
Service Campaign
Certain International® trucks and IC BusTM CE Series buses may have out of date BCM programing that may cause erroneous fault codes after a vehicle sits for 2 or 3 days.
IK1201516
Service Bulletin/Repair Instructions
This document will guide the user through parts information and installation instructions for the IMP Isolation Kit.
IK1201514
Service Bulletin/Repair Instructions
This document provides instructions for sealing oil leakage past the flywheel bolt holes on S13 engines. Oil leaking from behind the crankshaft gear may exit through the flywheel bolt holes and is often misdiagnosed as a rear crankshaft seal leak. This condition is confirmed by oil-saturated flywheel bolts and visible oil pooling in the flywheel bolt holes behind the gear.
IK2600255
Service Bulletin/Repair Instructions
This document provides guidance for assessing the feasibility of implementing a customer-requested change to an engine or vehicle parameter/feature. Customer requested changes will be approved in accordance with the requirements specified in 40 CFR Part 1037 to ensure continued compliance with greenhouse gas (GHG) regulations.
IK2600297
Service Bulletin/Repair Instructions
This document enables technicians to: 1. Accurately identify International® A26B engine control systems. 2. Understand the programming requirements and system behavior. 3. Perform programming tasks independently without needing technical support.
IK2600298
Service Bulletin/Repair Instructions
This document enables technicians to: 1. Accurately identify International® A26A engine control systems. 2. Understand the programming intricacies related to these systems. 3. Perform programming tasks independently without needing technical support.
IK1900301
Service Bulletin/Repair Instructions
The purpose of this article is to provide the user with the necessary tools and related manuals to maintain, diagnose, and repair an Espar Hydronic S3 Heater (GEN 3). The Espar Hydronic S3 (GEN 3) Auxiliary Heater is a diesel-fired coolant heater for maintaining cabin heat without running the engine. The heater uses fuel from the fuel tank to heat coolant before it goes to the heater core in the sleeper HVAC unit. The heater is located under the cab's sleeper area and is powered by the vehicle's batteries.
IK3100005
Emissions
This article will provide the calibration revision history for S13 Integrated EPA 2024 Powertrains.
IK1500109
Service Bulletin/Repair Instructions
This document will guide the user through supplemental fuel system diagnostics on 2017 A26 ESN 4500000 - 4599999.
IK2600069
Service Bulletin/Repair Instructions
This document will guide the user through troubleshooting steps to submitting a case file for a horsepower request.
IK2600090
Other
New CARB Idle Reduction Change Request
IK4300035
Service Bulletin/Repair Instructions
This tool is designed to compare Diamond Logic feature data across multiple vehicle configuration files. It allows users to quickly load files either manually or directly from the Diamond Logic Builder Vehicles folder using VIN-based selection. As files are added or removed, the comparison runs automatically with no manual action required. The program presents results in an interactive table that shows feature codes, descriptions, access levels, and whether each feature is present in each selected file. Built-in search, filtering, and sorting make it easy to locate specific features or focus only on differences between files. Column visibility can be customized to show or hide descriptions and access information as needed. Users can remove files individually or clear all files at once, with results updating instantly. The tool also includes reporting and export options that reflect exactly what is visible on screen, allowing results to be printed, copied, saved as text, or exported to CSV for use in Excel or other spreadsheet tools. Overall, the program streamlines the process of comparing vehicle feature configurations, helping users quickly identify differences, validate setups, and document results without manual comparison or external tools.
IK0800563
Service Bulletin/Repair Instructions
Feature code 0008TSJ for auto start stop is a feature that will allow you to preset values in the body controller to allow the truck to start when the battery voltage or engine oil temperature reaches the preset value. The engine will then run for a preset time after battery voltage is within programmed value (if the engine started for low voltage) or the engine will run until oil temperature reaches a programmed value (if the engine started for oil temperature).
IK2600047
Service Bulletin/Repair Instructions
Engine replacements for all International engines will need to follow this procedure.
IK1600272
Service Bulletin/Repair Instructions
This document will guide the user through a step-by-step procedure for detecting water leaks in vehicle cabs and windshields using an ultrasonic sound detector.
IK2600279
Service Bulletin/Repair Instructions
This document provides: Steps to take when switch pack programming fails, or when switch pack disappears after body control module update Sample scenarios Additional information to assist readers in understanding DLB switch pack programming
IK1201009
Service Bulletin/Repair Instructions
In some geographic areas, ambient temperatures reaching below 40°F (4°C), including high levels of humidity, an operator may experience engine stalling, low performance, and/or poor aftertreatment performance. This is caused by condensation accumulating and freezing within the Charge Air Cooler (CAC); affecting air flow into the engine. This article lists currently available winter front covers that can be installed on the front grille and bumper to reduce cold air flow to the engine compartment.
IK0600030
Service Bulletin/Repair Instructions
This document will guide the user through understanding Prop Shaft Codes and understanding the variations of prop codes. (Metric Prop codes start with the number a 4 and Non metric Prop codes start with a 2.)
IK0800689
Service Bulletin/Repair Instructions
In some instances, the driver's or passenger's door pod may become unresponsive, where it will not respond to any manual inputs from the driver or passenger. In some of these situations, it is possible for this symptom to be present without any fault codes becoming active. This article will guide the user through performing a hard reset of a door pod, which can restore the door pod to its operational condition, thereby avoiding the need for replacement. The steps in this article should be performed BEFORE diagnostics are completed for any active faults.
IK0800688
Service Bulletin/Repair Instructions
This document is to notify the field of an issue with BCM that causes various electrical system concerns after the vehicle sits for 2-3 days. This can affect all LT, RH, MV, HV models, 2021MY and up HX, 2024MY and up CE Bus with BCM kernel version 752, 753, and 754. Vehicles built or updated with DLB between 6/1/25 and 11/4/25 are suspected of having these kernels installed on the BCM. The most common complaint is that the steering wheel switches do not function, which, depending on the vehicle model and options, can cause the bus door, pupil warning lights, radio controls, marker interrupt, and cruise control to stop working. Other complaints can include short circuit faults from multiple sensor circuits attached to the BCM setting at the same time, the vehicle will not go into gear, the headlights are stuck on, the brake lights are stuck on, or the parking brake alarm is sounding (horn chirping) with the parking brake set. As of 11/4/25, these symptoms can be resolved by updating the BCM to kernel 755 or later with DLB.
IK0600001
Service Bulletin/Repair Instructions
Some interaxle shafts (the driveshaft connecting 2 drive axles) utilise special phasing. This is by design to reduce torsional vibrations. See Dana/Spicer letter here & Meritor here. Dana DS404 rear axle housing families use offset interaxle driveshaft phasing to reduce torsional vibrations. Depending on the interaxle driveshaft series, the phasing will be different. Vehicles built with 0417LTFXXXX drivelines until 03/23/2009 use 32 degree phasing, while vehicles built with 0417LTGXXXX drivelines from 3/12/2009 to current use 48 degree phasing. There is an overlap of 11 days where either shaft could have been used.
IK1201463
Service Bulletin/Repair Instructions
The purpose of this article is to describe all aspects of the A26 Connecting Rod Replacement Process.
IK1500111
Service Bulletin/Repair Instructions
This document will guide the user through the parts and information related to A26B resonator and EGR cross-over tube installation.
IK3400001
Service Bulletin/Repair Instructions
Title: Service Portal iKNow Feedback Case Types Applies To: All
IK1400005
Service Bulletin/Repair Instructions
Title: Driveline Information Center and Troubleshooting Procedures Applies To: All Vehicles
IK1900022
Service Bulletin/Repair Instructions
Title: A/C Refrigerant and Oil Capacities Applies To: All current models
IK0900157
Service Bulletin/Repair Instructions
Title: Fan belt replacement guidelines for frayed edges Applies To: All Models
IK2600262
Service Bulletin/Repair Instructions
Title: Export Recalibration Process & Emissions Label - A26 Applies To: Service Manager, General Manager, Technicians.
IK1200716
Service Bulletin/Repair Instructions
Title: Engine Emission Label Replacement, Certificate of Conformance and Clean Idle Sticker Addition Procedure Applies To: All Navistar Powered Trucks Requesting Engine Emission Label Replacement, Certificate of Conformance and/or Clean Idle Sticker, Clean Truck Check
IK1201519
Service Bulletin/Repair Instructions
Title: Replacing the Crankshaft Gear on S13 Engines
IK1201509
Service Bulletin/Repair Instructions
Title: S13 New Power Steering Tube Support Brackets
IK0500054
Service Bulletin/Repair Instructions
Title: Steering Gear Seal Repair Guidelines Applies To: Steering gears
IK1900299
Service Bulletin/Repair Instructions
Title: Parameters for 16UZL with 16VKW Applies To: Vehicles with both feature codes 16UZL and 16VKW
IK1201511
Service Bulletin/Repair Instructions
Title: Supplemental A26 MAF Fault Diagnostics Applies To: All A26 Engines
IK0300078
Service Bulletin/Repair Instructions
This document reminds technicians of the critical relationship between the truck's suspension and the driveline operating angles. The information applies to diesel, gas, and electric vehicles.
IK0800679
Service Bulletin/Repair Instructions
Title: Battery Disconnect Switch Replacement - Best Practices Applies To: All Models with Battery Disconnect Switch
IK0900156
Service Bulletin/Repair Instructions
Title: Connecting an Auxiliary APU to the S13 Coolant System
IK1600269
Service Bulletin/Repair Instructions
02/19/2025 - Added models including CE Bus with similar hood stop design 11/19/2024 - Updated service part numbers 06/11/2024 - Added rubber hose option as alternate repair 04/23/2024 - Added P/N for grease 03/29/2024 - Initial Article Release
IK0800672
Service Bulletin/Repair Instructions
Applies To: Units built 12/20/2022 - 11/11/2024 On the following models with Feature Codes: CE Bus- 0510234 LT RH- 001MBS & 0510234 LT RH- 008TRR or 0510234 & 001LRM or 001LRV or 001LRN or 001LRL
IK1201500
Service Bulletin/Repair Instructions
To improve the product's durability and prevent future damage for A26, S13, and Cummins X15-powered vehicles, International is sending this communication to the service network to ensure proper torque spec has been applied to the air filter assembly access cover fasteners when servicing the air filter(s).
IK1400023
Service Bulletin/Repair Instructions
This article addresses chassis lean conditions on all chassis. This does not include any diagnostics for body leans such as a cab lean. Keep in mind that a chassis lean may cause or accentuate a cab lean. Filling out the printable form and using the notes in blue will help you to determine the source of the lean and identify the action and parts required to correct the lean.
IK0800351
Service Bulletin/Repair Instructions
This document is used to help guide through fault codes.
IK12101498
Service Bulletin/Repair Instructions
This article will call out those VINs that are equipped with the shim, and if and when the shim should be used as a field repair solution.
IK19000292
Service Bulletin/Repair Instructions
This document will guide the user on the available part kits for servicing A/C system in the event of severe failure.
IK1600270
Service Bulletin/Repair Instructions
This document will guide the user through installing the upper mounting hardware in place of the missing C-Loop and/or look down mirrors.
IK0800659
Service Bulletin/Repair Instructions
This document will guide the user through relocating the No-Idle system's voltage sense source from the battery to the interior sleeper PDM.
iK1300193
Service Bulletin/Repair Instructions
This article will provide the necessary resources to set up PTO functionality parameters on the S13/T14 Integrated PowerTrain, primarily if PTO is installed after production.
iK2501990
Service Bulletin/Repair Instructions
This document will guide the user through installing the hood support bracket kit
Emission Recall 23519
Emissions
The Exhaust Gas Sensor In-Use Monitor Performance Ratio (IUMPR) may operate below the prescribed standard.
iK1500095
Service Bulletin/Repair Instructions
This document will provide the user with cleaning options and procedures for aluminum bright work parts that become stained or tarnished.
iK1600269
Service Bulletin/Repair Instructions
This document will guide the user through various field repairs to eliminate the squeaks, rattles knocking of the engine hood on International LTs and RHs
IK2600265
Service Bulletin/Repair Instructions
This document will guide the user on what to do when they receive a fault code after programming an ECM on A 26A engines
RC5000005
Service Bulletin/Repair Instructions
Update to International Preventative Maintenance
IK0400037
Service Bulletin/Repair Instructions
This document is to guide users to eliminate brake pedal rattle noise.
IK08000403
Service Bulletin/Repair Instructions
This document details the procedure that must be followed to ensure proper alternator troubleshooting.
IK0800482
Service Bulletin/Repair Instructions
This document covers battery diagnostics, maintenance and storage requirement.
IK0800407
Service Bulletin/Repair Instructions
Starter Diagnostics and warranty claim procedure; all engines EXCLUDING Cummins ISB engine with Allison transmission or PSI engine.
ik0800664
Service Bulletin/Repair Instructions
LT & RH aftertreatment PDM F2 fuse falling out or cracking.
IK1201406
Service Bulletin/Repair Instructions
A26 & S13 Fuel Gelling
IK0800664
Service Bulletin/Repair Instructions
LT / RH Aftertreatment PDM F2Fuse Falling out or Cracking
IK0800663
Service Bulletin/Repair Instructions
Corroded TPMS Receiver / Repeater Module Connectors; only models equipped with feature code 16VLS or 16VVM
23111
Service Bulletin/Repair Instructions
Certain LT and RH series trucks with Lane Keep Assist (LKA) may have outdated software in the LKA Electronic Control Unit (ECU), resulting in false positive fault codes. A software update will resolve this issue.
IK1600260
Service Bulletin/Repair Instructions
Tire Pressure Monitoring system; Feature Codes 16VLS, 16VUY, 16VVA, 16VVM, or 16VUZ
IK1201476
Service Bulletin/Repair Instructions
Rebuilding Cylinder Heads on Certain MaxxForce 11/13, N13, and A26 engines; 2010 to present.
IK1300192
Service Bulletin/Repair Instructions
Endurant Plumbing Retrofit; only models built with endurant transmission built before 11/01/2023
IK0300010
Service Bulletin/Repair Instructions
Diagnosis of chassis wander complaints.
IK0400040
Service Bulletin/Repair Instructions
General Wheel Speed Sensor Troubleshooting
IKo800080
Service Bulletin/Repair Instructions
J1939 Data Link Troubleshooting
IK1201391
Service Bulletin/Repair Instructions
Snap-On torque wrench requirement for all big bore engine connecting rod bolts; A26, MaxxForce 13, N13 engines
IK1600267
Service Bulletin/Repair Instructions
Cab Deflector Extension
IK1900272
Service Bulletin/Repair Instructions
Potential A/C Compressor Parts shortage - 4158126C1 (A/C compressor)
IK0800652
Service Bulletin/Repair Instructions
Fifth Wheel Unlock - Trailer Lamp Detection Calibration. Only models equipped with BCM feature code 597017
IK1201482
Service Bulletin/Repair Instructions
Removal and Installation of the Air Cleaner Assembly Cover and Air Filters; All Engines and only HX and LT series trucks with feature code 012VCB or 012VBZ Air Cleaner Assembly
IK1201466
Service Bulletin/Repair Instructions
New air compressor incorporates an oil feed dowel O-ring. Only models equipped with 2010 and newer MaxxForce 11/13 engines, all N13, and A26 engines
IK0800655
Service Bulletin/Repair Instructions
N2 telematics module not communicating with OCC systems. Only models built with feature codes 10ADT, 10AEY, 10AEU, 10AEZ, 10AGB, or 10AGC built from 04/04/2019 through 11/01/2022.
22502
Service Bulletin/Repair Instructions
Per agreement with EPA and CARB, Cummins, Inc. provided an emergency calibration for Cummins ISB, B6.7, ISL9, L9, and X15 engines when a DEF Quality Sensor (DQS) was not available. This action addressed the Diesel Exhaust Fluid (DEF) Quality Sensor failures in the field and the unavailability of parts due to the worldwide chip shortage. This recall is step two of this program designed to revert all affected vehicles back to the certified calibration and to provide them with the latest improved DQS and Coolant Control Valve (CCV) designs. Additionally, the emergency calibration and the restoration to the certified calibration with the latest improved DQS and Coolant Control Valve (CCV) designs have no effect on vehicle Emissions.
IK0700120
Service Bulletin/Repair Instructions
QLS Emergency Calibration Revert Process
IK1600265
Service Bulletin/Repair Instructions
Hood guide installation
23105
Service Bulletin/Repair Instructions
Certain HV, HX, LT, and RH Series trucks may have incorrect idle shutdown programmable parameters. Updating the programmable parameters will address this concern.
23106
Service Bulletin/Repair Instructions
Certain LT Series trucks may have incorrect idle shutdown programmable parameters. Updating the programmable parameters will address this concern.
23107
Service Bulletin/Repair Instructions
Certain LT Series trucks may have incorrect idle shutdown programmable parameters. Updating the programmable parameters will address this concern.
23108
Service Bulletin/Repair Instructions
Certain HV, LT, and RH Series trucks may have incorrect idle shutdown programmable parameters. Updating the programmable parameters will address this concern.
IK1200101
Service Bulletin/Repair Instructions
Cummins Programming guide and fault codes285 & 265; only vehicles built with Cummins B6.7, X15, or L9 engines
IK0800554
Service Bulletin/Repair Instructions
Telematics installation guidelines - Only units with 500K data link
22903
Service Bulletin/Repair Instructions
The Proposition 65 and/or DEF warning light labels may not have been installed at time of vehicle manufacture.
IK1201477
Service Bulletin/Repair Instructions
Installation of the 7104674C92 Engine Sensor Harness on 2021 and Newer International A26B engines.
IK0700115
Service Bulletin/Repair Instructions
QLS Emergency ECM Calibration; only models equipped with Cummins B6.7, X15, L9, or International A26 engines
22118
Service Bulletin/Repair Instructions
These certain trucks may have incorrect ECM programming in make and model programmable parameter. Only models built with 2021 model year A26 engines.
22513
Service Bulletin/Repair Instructions
The steering gears may have been assembled with less than the required input shaft ball bearings and can result in a fracture of the input shaft and loss of steering.
IK1201472
Service Bulletin/Repair Instructions
Pico Scope CCOS (Crankcase Separator Test)
IK0900134
Service Bulletin/Repair Instructions
LT A26 Cold Side CAC Hose Rupture
22116
Service Bulletin/Repair Instructions
Certain HV and LT Series trucks may have an alternator built with an incorrect voltage regulator that could result in excessive voltage fluctuation and possibly trigger the voltage warning lamp.
22115
Service Bulletin/Repair Instructions
The fifth wheel jaw release airline may be routed incorrectly and could result in a pinched line when the fifth wheel is moved forward.
IK1600261
Service Bulletin/Repair Instructions
Cab Components That Reduce Wheel End Vibration Complaints
IK0800605
Service Bulletin/Repair Instructions
PicoScope Test 5V & 12V Intermittent Open and Short circuit diagnostics
IK0800607
Service Bulletin/Repair Instructions
PicoScope Test - Battery Loss of Charge - Parasitic Draw Test
IK0800609
Service Bulletin/Repair Instructions
PicoScope Test for Datalink (CAN) Health Shorts & opens
IK0800610
Service Bulletin/Repair Instructions
PicoScope Test Resistance and Ohmmeter
IK0800611
Service Bulletin/Repair Instructions
PicoScope Wheel Speed Sensor Test
IK1201469
Service Bulletin/Repair Instructions
PicoScope Test One Channel RCT
IK1900268
Service Bulletin/Repair Instructions
Side mounted cab extender fins that provide more flexibility during trailer contact.
IK1600131
Service Bulletin/Repair Instructions
Cab water leak trouble shooting tips
IK1600133
Service Bulletin/Repair Instructions
Textured surfaces on painted plastic bumpers, chassis side skirts, and fender extendtions
IK1600136
Service Bulletin/Repair Instructions
Primer recommendation for matching textured panels to smooth panels for field repairs
22507
Service Bulletin/Repair Instructions
The positive battery cable to the inverter may chafe on the side skirts and over time could result in an electrical short to ground; only trucks built 02/10/2017 thru 02/25/2022 with a power inverter installed by Navistarâs Truck Specialty Center
IK0900147
Service Bulletin/Repair Instructions
DEF tank coolant hose routing on 73-inch sleeper cabs
Reading this report
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.