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Service bulletin 23512

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10243594
Published by NHTSA2023-10-05
Manufacturer's number23512
Manufacturer's date2023-09-13
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Certain International® N13 engines may be noncompliant to the required On Board Diagnostics (OBD) Monitor, Manufacturer’s Self-Test (MST) for over-boost, Exhaust Gas Recirculation (EGR) low flow, and EGR high flow monitors. Under certain conditions, this noncompliance may result in the failure to detect an increase in regulated air pollutants.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
INTERNATIONAL HX2017 to 2019
INTERNATIONAL PAYSTAR2015 to 2017
INTERNATIONAL PROSTAR2014
INTERNATIONAL PROSTAR2015
INTERNATIONAL PROSTAR2016 to 2018
INTERNATIONAL TRANSTAR2015 to 2018
INTERNATIONAL WORKSTAR2015
INTERNATIONAL WORKSTAR2016 to 2019

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20V8100002020-12-23. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
IK26003002026-03-04. Service bulletin. This article equips technicians with the knowledge and steps needed to efficiently replace and program N9/N10 and N13 modules, while addressing potential baud rate incompatibility issues between the replacement module and the vehicle.
IK26002842026-02-05. Service bulletin. This document aims to enable technicians to: 1. Accurately identify third generation MaxxForce medium duty engine control systems. 2. Understand the programming intricacies related to these systems. 3. Autonomously execute programming tasks without needing technical support.
IK26002832026-02-05. Service bulletin. This document aims to enable technicians to: 1. Accurately identify N-series medium duty engine control systems. 2. Understand the programming intricacies related to these systems. 3. Autonomously execute programming tasks without needing technical support.
IK26002562026-02-05. Service bulletin. This article is intended to provide information for how to program International Engines that have been sold to another company and installed in a chassis that does NOT have an International VIN Number. This may include Detroit Series 40 engines, Perkins, Street Sweepers, Cranes, Fire Trucks, Generators, Blower motors, and more.
IK26002552026-02-05. Other. 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.
IK26000902026-02-05. Other. New CARB Idle Reduction Change Request
IK26000472026-02-05. Service bulletin. Engine replacements for all International engines will need to follow this procedure.
IK080004032024-05-02. Service bulletin. This document details the procedure that must be followed to ensure proper alternator troubleshooting.
IK08004072024-03-06. Service bulletin. Starter Diagnostics and warranty claim procedure; all engines EXCLUDING Cummins ISB engine with Allison transmission or PSI engine.
IK12014762023-11-06. Service bulletin. Rebuilding Cylinder Heads on Certain MaxxForce 11/13, N13, and A26 engines; 2010 to present.