TSB: IC BUS 1300FBC, 9900I, CE, DURASTAR, HC, HV, HX, LONESTAR, LT, MV, PAYSTAR, PROSTAR, RE, TC, WORKSTAR (2017–2023)

Bulletin 22502 — May 10, 2023

Bulletin Details

Bulletin ID22502
ManufacturerIC BUS
Models1300FBC, 9900I, CE, DURASTAR, HC, HV, HX, LONESTAR, LT, MV, PAYSTAR, PROSTAR, RE, TC, WORKSTAR
Model Years2017–2023
Date IssuedMay 10, 2023
Date Added to NHTSAJune 6, 2023
ComponentENGINE AND ENGINE COOLING
Vehicles Affected67 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

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) Qualit

Affected Vehicles

MakeModelYearComponent
IC BUS CE 2023 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL LT 2023 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL MV 2023 060000 ENGINE AND ENGINE COOLING
IC BUS CE 2022 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL HV 2022 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL HX 2022 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL LONESTAR 2022 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL LT 2022 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL MV 2022 060000 ENGINE AND ENGINE COOLING
IC BUS RE 2022 060000 ENGINE AND ENGINE COOLING
IC BUS CE 2021 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL HV 2021 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL HX 2021 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL LONESTAR 2021 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL LT 2021 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL MV 2021 060000 ENGINE AND ENGINE COOLING
IC BUS RE 2021 060000 ENGINE AND ENGINE COOLING
IC BUS TC 2021 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL 1300FBC 2020 060000 ENGINE AND ENGINE COOLING
IC BUS CE 2020 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL DURASTAR 2020 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL HV 2020 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL HX 2020 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL LONESTAR 2020 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL LT 2020 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL MV 2020 060000 ENGINE AND ENGINE COOLING
IC BUS RE 2020 060000 ENGINE AND ENGINE COOLING
IC BUS TC 2020 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL WORKSTAR 2020 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL 1300FBC 2019 060000 ENGINE AND ENGINE COOLING
IC BUS CE 2019 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL DURASTAR 2019 060000 ENGINE AND ENGINE COOLING
IC BUS HC 2019 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL HV 2019 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL HX 2019 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL LONESTAR 2019 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL LT 2019 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL MV 2019 060000 ENGINE AND ENGINE COOLING
IC BUS RE 2019 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL WORKSTAR 2019 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL 1300FBC 2018 060000 ENGINE AND ENGINE COOLING
IC BUS CE 2018 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL DURASTAR 2018 060000 ENGINE AND ENGINE COOLING
IC BUS HC 2018 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL HX 2018 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL LONESTAR 2018 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL LT 2018 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL PROSTAR 2018 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL WORKSTAR 2018 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL 9900I 2017 060000 ENGINE AND ENGINE COOLING
IC BUS CE 2017 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL DURASTAR 2017 060000 ENGINE AND ENGINE COOLING
IC BUS HC 2017 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL HX 2017 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL LONESTAR 2017 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL PAYSTAR 2017 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL PROSTAR 2017 060000 ENGINE AND ENGINE COOLING
INTERNATIONAL WORKSTAR 2017 060000 ENGINE AND ENGINE COOLING

Related IC BUS Recalls

CampaignModelYearComponentSummary
EVSB 2026 ELECTRICAL SYSTEM:PROPULSION SYSTEM:T... International Motors, LLC (International) is recalling certain 2022-2027 IC B...
EVSB 2022 ELECTRICAL SYSTEM:PROPULSION SYSTEM:T... International Motors, LLC (International) is recalling certain 2022-2027 IC B...
EVSB 2025 ELECTRICAL SYSTEM:PROPULSION SYSTEM:T... International Motors, LLC (International) is recalling certain 2022-2027 IC B...
EVSB 2024 ELECTRICAL SYSTEM:PROPULSION SYSTEM:T... International Motors, LLC (International) is recalling certain 2022-2027 IC B...
EVSB 2027 ELECTRICAL SYSTEM:WIRING:SWITCHES/KNO... International Motors, LLC (International) is recalling certain 2022-2027 IC B...

What Should You Do?

If your vehicle is affected by this TSB, contact your authorized IC BUS dealer. Bring this bulletin ID (22502) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.