2022 International RH TSBs
133 Technical Service Bulletins across 14 categories
Categories
Engine
51 bulletinsThis article will provide the calibration revision history for A26B EPA 2021 engines.
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NOTE: SDS calibrations will update to the most recently released calibration. The latest calibration content will include all previously released calibration content.
This document will guide the user through to inspect A26 turbochargers remanufactured by SRC between 05/01/2023 and 02/01/2025.
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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.
This document will guide the user through the changes of the dielectric grease/coatings used in certain areas on all...
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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.
This document provides guidance for assessing the feasibility of implementing a customer-requested change to an engine or vehicle parameter/feature.
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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.
This document enables technicians to: 1.
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Accurately identify International A26B engine control systems. 2. Understand the programming requirements and system behavior. 3. Perform programming tasks independently without needing technical support.
This document enables technicians to: 1.
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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.
This document provides guidance for assessing the feasibility of implementing a customer-requested change to an engine or vehicle parameter/feature.
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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.
New CARB Idle Reduction Change Request
Engine replacements for all International engines will need to follow this procedure.
In some geographic areas, ambient temperatures reaching below 40F (4C), including high levels of humidity, an operator...
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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.
This document will guide the user through diagnosing an intermittent shutdown complaint on a 2021 A26 (A26B), whether...
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the vehicle is coming to a stop or sitting at idle.
This document guides dealer technicians through the programming process for an A26a (2017-2021) engine swap (both NEU...
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and new engines).
In some geographic areas, ambient temperatures reaching below 15F (-10 C), including high levels of humidity, an...
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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 all the currently available winter front covers that can be installed on the front grille and bumper to reduce cold air flow to the engine compartment.
Title: Engine Emission Label Replacement, Certificate of Conformance and Clean Idle Sticker Addition Procedure Applies...
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To: All Navistar Powered Trucks Requesting Engine Emission Label Replacement, Certificate of Conformance and/or Clean Idle Sticker, Clean Truck Check
Title: Replacing the Crankshaft Gear on S13 Engines
Title: Supplemental A26 MAF Fault Diagnostics Applies To: All A26 Engines
Title: How to Request a Horsepower Quote Applies To: All International and Cummins Electronic engines
Applies To: All Navistar Powered Trucks Requesting Engine Emission Label Replacement, Certificate of Conformance and/or...
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Clean Idle Sticker, Clean Truck Check
This document will guide the user through various field repairs to eliminate the squeaks, rattles knocking of the engine...
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hood on International LTs and RHs
This document will guide the user on what to do when they receive a fault code after programming an ECM on A 26A engines
Certain International vehicles built with A26 engines does meet the emission requirements for J1939-Stationary Test
Starter Diagnostics and warranty claim procedure; all engines EXCLUDING Cummins ISB engine with Allison transmission or...
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PSI engine.
Rebuilding Cylinder Heads on Certain MaxxForce 11/13, N13, and A26 engines; 2010 to present.
A26 and S13 Fuel Gelling; only vehicles equipped with International A26 or S13 engines
How to request a horsepower quote; all International and Cummins engines
Snap-On torque wrench requirement for all big bore engine connecting rod bolts; A26, MaxxForce 13, N13 engines
This Emissions Recall applies to truck models for which, per agreement with EPA and CARB, Navistar, Inc.
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provided an emergency calibration for International A26 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.
New air compressor incorporates an oil feed dowel O-ring.
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Only models equipped with 2010 and newer MaxxForce 11/13 engines, all N13, and A26 engines
New Air compressor Incorporates an oil feed dowel O-ring; only models built with MaxxForce 11/13, N13, or A26 Engines
Rebuilding cylinder heads on certain EPA 2010 MaxxForce 11/13, N13, and A26 Engines
Cummins Programming guide and fault codes285 & 265; only vehicles built with Cummins B6.7, X15, or L9 engines
Starter diagnostics and warranty claim procedure for all engines and all chassis EXCLUDING vehicles equipped with PSI...
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engines or Cummins ISB engine with Allison transmissions
Certain HV, HX, LT, and RH Series trucks may have incorrect idle shutdown programmable parameters.
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Updating the programmable parameters will address this concern.
Installation of the 7104674C92 Engine Sensor Harness on 2021 and Newer International A26B engines.
Rebuilding Cylinder Heads on Certain International MaxxForce 11/13 engines and all International N13 and A26 engines
QLS Emergency ECM Calibration; only models equipped with Cummins B6.7, X15, L9, or International A26 engines
QLS Emergency Calibration.
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applies to 2016 and newer Cummins B6.6, X15, and L9 engines and all A26 engines
During extreme cold ambient conditions, ice may form on the Intake Manifold Pressure (IMP) sensor and result in an...
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engine derate condition and increased NOx emissions while operating in this mode. Only with 2022 model year A26 engines.
These certain trucks may have incorrect ECM programming in make and model programmable parameter.
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Only models built with 2021 model year A26 engines.
The Body Control Module (BCM) may have outdated software that could result in active Over The Air (OTA) programming to...
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not fully complete and result in an inoperative Engine Control Module (ECM). Only models with International A26 engine and feature code 10ADT, 10AEK, 10AEU, 10AEY, 10AEZ, 10AGB, or 10AGC (Telematics Communications Module).
International A26 engine fuel delivery pressure sensor and harness pigtail eliminated
Installing P/N 7104373C91 A26 Engine Sensor Harness
LINK ride height smart valve operation and troubleshooting guide
2021 A26 low power in cold climates.
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Only vehicles equipped with A26 engine
High Pressure Fuel Pump external leaks from weep hole.
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only trucks with 2010 MaxxForce 11/13L, all N13, or A26 engines
QLS Emergency Calibration; Models equipped with 2016 and newer Cummins B6.7, X15 and L9 engines or International A26...
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engine.
QLS Emergency Calibration; Models with 2016 Cummins ISX, A26 and EPA 2017 and newer Cummins X15, L9, or B6.7 engines
The Environmental Protection Agency (EPA) and California Air Resources Board (CARB) have approved an emergency...
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calibration to provide temporary relief from the global supply shortage of electrical components. When there is a communication fault in the DEF head unit / Quality Level Sensor (QLS) this temporary calibration will allow the vehicle to operate. The procedure in this document will include diagnosing the DEF head unit / QLS and if found to be defective will advise to install the temporary engine calibration if replacement parts are not available. Any vehicle that receives this calibration will be required to have it removed and a new QLS installed once parts become available, this will be managed through future communication.
Oil leaks at the Bottom of the Oil Filter Module; Only International A26, N13, or 2010 and newer 11 and 13 engines
Engine Oil Capacities.
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All International electronic engines 1994 to present and Cummins ISB, ISM, or ISX engines
QLS Emergency Calibration.
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Only models with EPA 2017 and newer Cummins X15, L9, or B6.7 engines
Other
24 bulletinsThis document will guide the user through parts information and installation instructions for the IMP Isolation Kit.
This document will guide the user through understanding Prop Shaft Codes and understanding the variations of prop codes.
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(Metric Prop codes start with the number a 4 and Non metric Prop codes start with a 2.)
The purpose of this article is to describe all aspects of the A26 Connecting Rod Replacement Process.
Title: Driveline Information Center and Troubleshooting Procedures Applies To: All Vehicles
Title: Fan belt replacement guidelines for frayed edges Applies To: All Models
Switch Pack Programming Troubleshooting Information
Title: Connecting an Auxiliary APU to the S13 Coolant System
Title: Supplemental A26 MAF Fault Diagnostics
This article will call out those VINs that are equipped with the shim, and if and when the shim should be used as a...
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field repair solution.
This document will provide the user with cleaning options and procedures for aluminum bright work parts that become...
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stained or tarnished.
J1939 Data Link Source Address Information
Diagnosis of chassis wander complaints.
J1939 Data Link Source Address Information
J1939 Data Link Troubleshooting
Telematics installation guidelines - Only units with 500K data link
J1939 Data link source address information
Pico Scope CCOS (Crankcase Separator Test)
PicoScope Test One Channel RCT
PicoScope Test Resistance and Ohmmeter
PicoScope Test for Datalink (CAN) Health Shorts & opens
J1939 Data Link Source Address Information
Greenhouse Gas Phase 2 Regulatory Compliance Implementation
J1939 Data Link Troubleshooting
How to obtain As built parameter list
Electrical
22 bulletinsCertain International trucks and IC BusTM CE Series buses may have out of date BCM programing that may cause erroneous...
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fault codes after a vehicle sits for 2 or 3 days.
Certain International trucks and IC BusTM CE Series buses may have out of date BCM programing that may cause erroneous...
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fault codes after a vehicle sits for 2 or 3 days.
This document provides: Steps to take when switch pack programming fails, or when switch pack disappears after body...
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control module update Sample scenarios Additional information to assist readers in understanding DLB switch pack programming
Title: Battery Disconnect Switch Replacement - Best Practices Applies To: All Models with Battery Disconnect Switch
The Exhaust Gas Sensor In-Use Monitor Performance Ratio (IUMPR) may operate below the prescribed standard.
This document details the procedure that must be followed to ensure proper alternator troubleshooting.
This document covers battery diagnostics, maintenance and storage requirement.
LT & RH aftertreatment PDM F2 fuse falling out or cracking.
Aftertreatment PDM F2 fuse falling out or cracking.
Corroded TPMS Receiver / Repeater Module Connectors; only models equipped with feature code 16VLS or 16VVM
Certain LT and RH series trucks with Lane Keep Assist (LKA) may have outdated software in the LKA Electronic Control...
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Unit (ECU), resulting in false positive fault codes. A software update will resolve this issue.
Chassis Harness Rubbing Inner Fender; Only RH series trucks built prior to 07/03/2023
General Wheel Speed Sensor Troubleshooting
Fifth Wheel Unlock - Trailer Lamp Detection Calibration.
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Only models equipped with BCM feature code 597017
N2 telematics module not communicating with OCC systems.
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Only models built with feature codes 10ADT, 10AEY, 10AEU, 10AEZ, 10AGB, or 10AGC built from 04/04/2019 through 11/01/2022.
PicoScope Wheel Speed Sensor Test
PicoScope Test - Battery Loss of Charge - Parasitic Draw Test
PicoScope Test 12V Electrical Noise Detection
PicoScope Test 5V & 12V Intermittent Open and Short circuit diagnostics
Certain International HX, LT, LoneStar, and RH series trucks equipped with feature code 0597524 (ESPAR heater), may have...
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an outdated BCM calibration that could result in the ESPAR heater not restarting in certain conditions.
New or replacement body control Module (BC,BCM) not detected; Gen 4 BCM
Certain LT and RH series trucks may have been built without a telematics module.
Transmission
8 bulletinsThis 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.
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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.
Title: S13 Gear Housing Leak (By The Air Compressor) Applies To: S13 Integrated Powertrain LT RH HX
Title: Steering Gear Seal Repair Guidelines Applies To: Steering gears
This document will guide the user how to properly diagnose or repair a truck equipped with a Sheppard's steering gear...
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with Auto Relief Plungers.
Endurant Plumbing Retrofit; only models built with endurant transmission built before 11/01/2023
The steering gears may have been assembled with less than the required input shaft ball bearings and can result in a...
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fracture of the input shaft and loss of steering.
As reported by R. H. Sheppard Co., Inc.
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in their defect report to NHTSA (Recall 22E-047), steering gears were assembled with fewer than the required number of recirculating balls which can lead to a fracture in the steering gear worm-shaft and loss of vehicle steering.
Power Steering Diagnostics Flow / Pressure Specifications For Power Steering Gears and Power Steering Pumps
Fuel System
7 bulletinsThis document will guide the user through the parts and information related to A26B resonator removal and EGR cross-over...
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tube installation.
This document will guide the user through the parts and information related to A26B resonator removal and EGR cross-over...
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tube installation.
This document will guide the user through supplemental fuel system diagnostics on 2017 A26 ESN 4500000 - 4599999.
This document will guide the user through the parts and information related to A26B resonator removal and EGR cross-over...
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tube installation.
This document will guide the user through diagnosing the fuel/soot mixture found in the EGR system.
This document will guide the user through the parts and information related to A26B resonator and EGR cross-over tube...
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installation.
A26 & S13 Fuel Gelling
Body & Paint
6 bulletinsIn some instances, the driver's or passenger's door pod may become unresponsive, where it will not respond to any manual...
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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.
This article addresses chassis lean conditions on all chassis.
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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.
This document will guide the user through installing the hood support bracket kit
Cab water leak trouble shooting tips
Primer recommendation for matching textured panels to smooth panels for field repairs
Textured surfaces on painted plastic bumpers, chassis side skirts, and fender extendtions
Tires & Wheels
4 bulletinsTire Pressure Monitoring system; Feature Codes 16VLS, 16VUY, 16VVA, 16VVM, or 16VUZ
Tire Pressure Monitoring systems (TPMS); Only LT, RH, HV, HX, or MV series trucks with feature code 16VLS, 16VUY,...
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16VVA,16VUZ, or 16VVM
Cab Components That Reduce Wheel End Vibration Complaints
Cab Components That Reduce Wheel End Vibration Complaints.
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NOTE: Lonestar Day Cab Only
Brakes
2 bulletinsThis document will guide the user through a step-by-step procedure for detecting water leaks in vehicle cabs and...
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windshields using an ultrasonic sound detector.
This document is to guide users to eliminate brake pedal rattle noise.
HVAC & Climate
2 bulletinsTitle: A/C Refrigerant and Oil Capacities Applies To: All current models
2021 A26 Low Power In Cold Climates
Software & Calibration
2 bulletinsUpdate to International Preventative Maintenance
QLS Emergency Calibration Revert Process
Lighting
2 bulletinsFifth Wheel Unlock - Trailer Lamp Detection; Only Vehicles built with Feature Code 597017
The Proposition 65 and/or DEF warning light labels may not have been installed at time of vehicle manufacture.
Infotainment
1 bulletinThis tool is designed to compare Diamond Logic feature data across multiple vehicle configuration files.
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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.
Pre-Delivery & Maintenance
1 bulletinTitle: Service Portal iKNow Feedback Case Types Applies To: All
Suspension
1 bulletinThis document reminds technicians of the critical relationship between the truck's suspension and the driveline operating angles.
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The information applies to diesel, gas, and electric vehicles.