2021 International LT technical service bulletins
200 technical service bulletins and manufacturer communications cover the 2021 International LT.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Feature code 0008TSJ for auto start stop is a feature that will allow you to preset values in the body...
- This article provides service part information for replacing a cracked gauge cluster lens
- Effective January 1, 2008 , engines built for vehicles registered in California or a CARB (Air Resources...
- This article provides guidance to dealership personnel, Technical Services personnel, Dealer Service...
- This document will guide the user through the parts and information related to A26B resonator removal and...
- This document will guide the user through the changes of the dielectric grease/coatings used in certain...
- Certain International® trucks and IC BusTM CE Series buses may have out of date BCM programing that may
- This document will guide the user through parts information and installation instructions for the IMP...
- This document provides guidance for assessing the feasibility of implementing a customer-requested change...
- This document enables technicians to: 1. Accurately identify International® A26A engine control systems
- This document enables technicians to: 1. Accurately identify International® A26B engine control systems
- Some interaxle shafts (the driveshaft connecting 2 drive axles) utilize special phasing
- This document will guide the user through supplemental fuel system diagnostics on 2017 A26 ESN 4500000
- This document will guide the user through troubleshooting steps to submitting a case file for a horsepower...
- New CARB Idle Reduction Change Request
- This tool is designed to compare Diamond Logic feature data across multiple vehicle configuration files
- Engine replacements for all International engines will need to follow this procedure.
- This document will guide the user through a step-by-step procedure for detecting water leaks in vehicle...
- This document provides: Steps to take when switch pack programming fails, or when switch pack disappears...
- In some geographic areas, ambient temperatures reaching below 40°F (4°C), including high levels of...
- This document will guide the user through diagnosing an intermittent shutdown complaint on a 2021 A26...
- This document guides dealer technicians through the programming process for an A26a (2017-2021) engine...
- This document will guide the user through understanding Prop Shaft Codes and understanding the variations...
- In some instances, the driver's or passenger's door pod may become unresponsive, where it will not respond...
- In some geographic areas, ambient temperatures reaching below 15°F (-10 °C), including high levels of...
- This document is to notify the field of an issue with BCM that causes various electrical system concerns...
- Some interaxle shafts (the driveshaft connecting 2 drive axles) utilise special phasing
- 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...
- Title: Service Portal iKNow Feedback Case Types Applies To: All
- Title: Driveline Information Center and Troubleshooting Procedures Applies To: All Vehicles
- Title: A/C Refrigerant and Oil Capacities Applies To: All current models
- Title: Fan belt replacement guidelines for frayed edges Applies To: All Models
- Title: Export Recalibration Process & Emissions Label
- Title: S13 Gear Housing Leak (By The Air Compressor) Applies To: S13 Integrated Powertrain LT RH HX
- Title: Engine Emission Label Replacement, Certificate of Conformance and Clean Idle Sticker Addition...
- Title: Replacing the Crankshaft Gear on S13 Engines
- Title: S13 New Power Steering Tube Support Brackets
- Title: 2021 A26 (A26B)
- Title: Steering Gear Seal Repair Guidelines Applies To: Steering gears
- Title: How to Request a Horsepower Quote Applies To: All International and Cummins Electronic engines
- Title: Parameters for 16UZL with 16VKW Applies To: Vehicles with both feature codes 16UZL and 16VKW
- Title: Supplemental A26 MAF Fault Diagnostics Applies To: All A26 Engines
- This document reminds technicians of the critical relationship between the truck's suspension and the...
- Switch Pack Programming Troubleshooting Information
- Applies To: All Navistar Powered Trucks Requesting Engine Emission Label Replacement, Certificate of...
- Title: Battery Disconnect Switch Replacement
- Title: Supplemental A26 MAF Fault Diagnostics
- Title: Connecting an Auxiliary APU to the S13 Coolant System
- This article addresses chassis lean conditions on all chassis
- This document is used to help guide through fault codes.
- This article will call out those VINs that are equipped with the shim, and if and when the shim should be...
- This document will guide the user on the available part kits for servicing A/C system in the event of...
- This document will guide the user how to properly diagnose or repair a truck equipped with a Sheppard's...
- This document will guide the user how to addresses chassis lean conditions on all chassis.
- This document will guide the user through relocating the No-Idle system's voltage sense source from the...
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- This document will guide the user through various field repairs to eliminate the squeaks, rattles knocking...
- This document will provide the user with cleaning options and procedures for aluminum bright work parts...
- This document will guide the user on what to do when they receive a fault code after programming an ECM on...
- Update to International Preventative Maintenance
- This document is to guide users to eliminate brake pedal rattle noise.
- This document covers battery diagnostics, maintenance and storage requirement.
- This document details the procedure that must be followed to ensure proper alternator troubleshooting.
- Certain International vehicles built with A26 engines does meet the emission requirements for...
- Starter Diagnostics and warranty claim procedure; all engines EXCLUDING Cummins ISB engine with Allison...
- LT & RH aftertreatment PDM F2 fuse falling out or cracking.
- A26 & S13
- 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...
- J1939 Data Link Source Address Information
- Tire Pressure Monitoring system; Feature Codes 16VLS, 16VUY, 16VVA, 16VVM, or 16VUZ
- A26 and S13 Fuel Gelling; only vehicles equipped with International A26 or S13 engines
- Rebuilding Cylinder Heads on Certain MaxxForce 11/13, N13, and A26 engines; 2010 to present.
- Endurant Plumbing Retrofit; only models built with endurant transmission built before 11/01/2023
- No Idle HVAC run time shorter than expected
- Diagnosis of chassis wander complaints.
- General Wheel Speed Sensor Troubleshooting
- How to request a horsepower quote; all International and Cummins engines
- J1939 Data Link Troubleshooting
- Snap-On torque wrench requirement for all big bore engine connecting rod bolts; A26, MaxxForce 13, N13 engines
- Potential A/C Compressor Parts shortage
- Fifth Wheel Unlock
- QLS Emergency Calibration Revert Process
- Removal and Installation of the Air Cleaner Assembly Cover and Air Filters; All Engines and only HX and LT...
- This Emissions Recall applies to truck models for which, per agreement with EPA and CARB, Navistar, Inc....
- New air compressor incorporates an oil feed dowel O-ring
- N2 telematics module not communicating with OCC systems
- Per agreement with EPA and CARB, Cummins, Inc. provided an emergency calibration for Cummins ISB, B6.7,...
- Auto Start Stop Information and troubleshooting; Only LT with feature code 08TSJ
- Tire Pressure Monitoring systems (TPMS); Only LT, RH, HV, HX, or MV series trucks with feature code 16VLS,...
- New Air compressor Incorporates an oil feed dowel O-ring; only models built with MaxxForce 11/13, N13, or...
- Hood guide installation
- Certain HV, HX, LT, and RH Series trucks may have incorrect idle shutdown programmable parameters
- Cummins Programming guide and fault codes285 & 265; only vehicles built with Cummins B6.7, X15, or L9 engines
- Telematics installation guidelines
- Starter diagnostics and warranty claim procedure for all engines and all chassis EXCLUDING vehicles...
- Rebuilding cylinder heads on certain EPA 2010 MaxxForce 11/13, N13, and A26 Engines
- LT Truck headlight harness inspection and repair; only units built prior to 04/11/2022
- Rebuilding Cylinder Heads on Certain International MaxxForce 11/13 engines and all International N13 and...
- The Proposition 65 and/or DEF warning light labels may not have been installed at time of vehicle manufacture.
- Service Diagnostic Software (SDS) Template to enable Recall 22518 connecting rod knock detection software
- Installation of the 7104674C92 Engine Sensor Harness on 2021 and Newer International A26B engines.
- QLS Emergency ECM Calibration; only models equipped with Cummins B6.7, X15, L9, or International A26 engines
- QLS Emergency Calibration
- J1939 Data link source address information
- These certain trucks may have incorrect ECM programming in make and model programmable parameter
- Pico Scope CCOS (Crankcase Separator Test)
- Lt A26
- During high electrical demand, the cables that ground the batteries to the vehicle frame can carry the...
- Cab Components That Reduce Wheel End Vibration Complaints
- PicoScope Test 5V & 12V Intermittent Open and Short circuit diagnostics
- PicoScope Test
- PicoScope Test for Datalink (CAN) Health Shorts & opens
- PicoScope Test Resistance and Ohmmeter
- PicoScope Wheel Speed Sensor Test
- PicoScope Test One Channel RCT
- Cab Components That Reduce Wheel End Vibration Complaints
- Under certain conditions, the Engine Control Module (ECM) programming may not detect when the Exhaust Gas...
- The Body Control Module (BCM) may have outdated software that could result in active Over The Air (OTA)...
- Potential A/C Compressor Parts Shortage
- Side mounted cab extender fins that provide more flexibility during trailer contact.
- International A26 engine fuel delivery pressure sensor and harness pigtail eliminated
- Cab water leak trouble shooting tips
- Textured surfaces on painted plastic bumpers, chassis side skirts, and fender extendtions
- Primer recommendation for matching textured panels to smooth panels for field repairs
- The positive battery cable to the inverter may chafe on the side skirts and over time could result in an...
- Cab water leak troubleshooting tips; HX with steel cab only
- Water leaks past plastic vapor barrier sheet in the inner cavity of the cab entry door
- LINK ride height smart valve operation and troubleshooting guide
- Installing P/N 7104373C91 A26 Engine Sensor Harness
- 2021 A26
- 2021 A26 low power in cold climates
- High Pressure Fuel Pump external leaks from weep hole
- Certain LT Series trucks built with feature codes 004XCL and 004XCN (L2.0 ADB Air disc Brakes), over time...
- Greenhouse Gas Phase 2 Regulatory Compliance Implementation
- QLS Emergency Calibration; Models equipped with 2016 and newer Cummins B6.7, X15 and L9 engines or...
- Power Steering Diagnostics Flow / Pressure Specifications For Power Steering Gears and Power Steering Pumps
- QLS Emergency Calibration; Models with 2016 Cummins ISX, A26 and EPA 2017 and newer Cummins X15, L9, or...
- How to obtain As built parameter list
- New or replacement body control Module (BC,BCM) not detected; Gen 4 BCM
- The Environmental Protection Agency (EPA) and California Air Resources Board (CARB) have approved an...
- The ESPAR heater may not function properly because of a constant voltage supply from the BCM to the ESPAR...
- QLS Emergency Calibration
- Engine Oil Capacities
- Oil leaks at the Bottom of the Oil Filter Module; Only International A26, N13, or 2010 and newer 11 and 13...
- Snap-On torque wrench requirement for all big bore engine connecting rod bolt(s).
- Cab water leak troubleshooting tips
- Altec Industries, Inc. has received notification from Navistar that a condition exists relating to motor...
- General wheel speed sensor troubleshooting
- SiriusXM Reception Issues with Film Antenna in Hi-Rise Sleeper
- Lane Departure Warning Alert Active with Turn Signals On; Only models equipped with Lane Departure Warning
- Aftertreatment Clamp Corrosion; Single Can Aftertreatment Systems
- Navistar N2 Telematics with Predictive Cruse Control; Only LT Series built after July 9th, 2020 with...
- CPA BEAM RCT and Idle Test for A26 engine; only trucks equipped with International A26 engine
- The connecting rod bushing over time may develop cracks or lose chunks of material that could lead to...
- A26 Fuel Delivery Pressure Sensor (FDP) and Harness Pigtail Eliminated; only trucks equipped with...
- The spring inside the spring brake chamber may allow the pressure plate to shift and wear a hole through...
- Certain HV, LT, MV, and RH series trucks do not conform to Federal Motor Vehicle Safety Standard (FMVSS)...
- Sleeper bunk cabinet door latch installation and adjustment
- The battery ground cable may break at the frame connection resulting in loss of electrical power and...
- Day cab roof air deflector causing loud vibration noise at highway speed
- Radio clock changes time automatically; Only vehicles built after March 2020 and excluding CV
- The battery ground cable may break at the frame connection resulting in loss of electrical power and...
- Frame Rail Straightness Inspection Procedure
- Steering Shake, Shimmy, Shudder, Wobble, Steering Vibration; only models built with 14K weight rated axles...
- A26, N13, and 2010 EPA MaxxForce 11 and 13 engine Auxiliary Programable Parameters
- This document will guide the user through what is normal appearance for a NEU A26 replacement engine assembly
- Programming Procedure for Center Panel Switch Packs
- 1 channel CPA RCT test for A26 or CV 6.6L; Only trucks built with International A26 or 6.6 engines
- Feature 16VLS Tire Pressure Maintenance System (TPMS)
- 7095496C3 EGR
- Fuel Filters, Winter Additives, and Blending Fuels for Cummins® Engines
- Certain vehicles with a manual transmission may need the BCM to be updated for the over-the-air (OTA)...
- The mirror glass of the hood mirrors may have been assembled incorrectly and could
- Foot Valve Air Leak- Bendix ATR6 Traction Control Relay Valve Diagnostics; Only Models with Cummins X15...
- Cab Lean Concern
- Dielectric Grease Change
- Driveline Information Center and Troubleshooting Procedures
- The telematics module may not “call home,” resulting in an inability to perform over-the-air programming.
- Bluetooth Cannot Be Connected to Radio
- Repair Procedures for Vehicles Struck by Lightning
- DEF Coolant Line Leak Rear of Engine; only models with International A26 engine
- Ambient Air Temperature (AAT) Sensor Faults/Location/Diagnostics
- This document will guide the user through the proper use of the A26 Misfire Detection Session to determine...
- Programming procedures for the center panel switch packs has changed.
- A/C Refrigerant and Oil Capacities
- Eaton AMT Calibration Update with 2020 Cummins® X15 Engines; only trucks built 02 January 2020 through 02...
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