# Service bulletin TSB54\-377\-FTL

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.

- Type: Service bulletin
- NHTSA id: 11027199
- Published by NHTSA: 2026\-01\-07
- Manufacturer's number: TSB54\-377\-FTL
- Manufacturer's date: 2025\-12\-01
- NHTSA component: ENGINE

## NHTSA's summary

Technical Service Bulletin Low Coolant Sensor

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11027199-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11027199-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2022 to 2026 FREIGHTLINER 108SD
- 2022 to 2026 FREIGHTLINER 114SD
- 2022 to 2026 FREIGHTLINER BUSINESS CLASS M2
- 2022 to 2026 FREIGHTLINER CASCADIA

## Recalls for the same vehicles and component

- [23V737000](/recalls/nhtsa/23V737000.md), 2023-11-02: ENGINE
- [2022413](/recalls/tc/2022413.md), 2022-07-29: Engine
- [22V554000](/recalls/nhtsa/22V554000.md), 2022-07-29: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\)
- [21V715000](/recalls/nhtsa/21V715000.md), 2021-09-15: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
- [21V073000](/recalls/nhtsa/21V073000.md), 2021-02-12: ENGINE

## Other bulletins for the same vehicles and component

- [CXA 07\_25\_F1011,F1015 Lbl](/bulletins/11035715.md), 2026-08-05, Other: ENGINE. CX Advocate for Lost/Damaged Replacement F1011/F1015 Labels
- [ICI26\-007](/bulletins/11031975.md), 2026-05-02, Other: ENGINE. Important Campaign Information for SF735 \- Campaign Suspended
- [CXA 03\_26\_Surge Tank](/bulletins/11030507.md), 2026-04-02, Other: ENGINE. CX Advocate for discolored coolant surge tanks \(24CSA\-20\)
- [CXA 03\_26\_SSR](/bulletins/11030506.md), 2026-04-02, Other: ENGINE. CX Advocate for error generates when SSR is moved into an engine brake position 1,2,3 \(TSB\-26\-058\-FTL, TSB\-26\-009\-WST\)
- [CXA 03\_26\_DPF Ash](/bulletins/11030504.md), 2026-04-02, Other: ENGINE. CX Advocate for Gen 5 521133/13 DPF Ash Mileage Mismatch
- [SF735\-DLR LTR](/bulletins/11030499.md), 2026-04-02, Service campaign: ENGINE. Revised Field Service campaign for Adaptive Cruise Control \(ACC\): Cummins Medium Duty Engines
- [SF735\-Bulletin](/bulletins/11030494.md), 2026-04-02, Service campaign: ENGINE. Revised Field Service campaign for Adaptive Cruise Control \(ACC\): Cummins Medium Duty Engines
- [TitanX Extension](/bulletins/11029510.md), 2026-03-04, Warranty extension: ENGINE. Standard Warranty Extension for vehicles with TitanX Radiators
- [CAL FTL\-20\-008](/bulletins/11028057.md), 2026-02-03, Other: ENGINE. Customer Advisory Letter for Variable Speed Water Pump Remains Fully Engaged
- [FleetCom\_Heater Core](/bulletins/11027493.md), 2026-01-08, Other: ENGINE. Fleet Communications for Heater Core Plugging

JSON: [/v1/bulletins/11027199](/v1/bulletins/11027199)

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