Service bulletin FL974
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 | 10249516 |
| Published by NHTSA | 2024-02-06 |
| Manufacturer's number | FL974 |
| Manufacturer's date | 2024-01-19 |
| NHTSA component | ENGINE AND ENGINE COOLING |
NHTSA's summary
Emissions Recall: Cummins DEF Sensor Shortage
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
| FCCC MB | 2019 |
|---|---|
| FCCC MT45 | 2016 to 2022 |
| FCCC MT55 | 2016 to 2022 |
| FCCC S2C | 2018 to 2022 |
| FCCC S2RV | 2017 to 2022 |
| FCCC XBA | 2019 to 2020 |
| FCCC XBP | 2016 to 2021 |
| FCCC XBR | 2016 to 2021 |
| FCCC XBS | 2016 to 2022 |
| FCCC XCA | 2017 |
| FCCC XCL | 2016 to 2021 |
| FCCC XCM | 2016 to 2022 |
| FCCC XCP | 2016 to 2021 |
| FCCC XCR | 2016 to 2022 |
| FCCC XCS | 2016 to 2022 |
| FREIGHTLINER 108SD | 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
| FREIGHTLINER 114SD | 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
| FREIGHTLINER 122SD | 2016 to 2022 |
| FREIGHTLINER BUSINESS CLASS M2 | 2016 to 2022 |
| FREIGHTLINER CASCADIA | 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
| THOMAS BUILT BUSES SAF-T-LINER C2 | 2016 to 2022 |
| THOMAS BUILT BUSES SAF-T-LINER EFX | 2016 to 2022 |
| THOMAS BUILT BUSES SAF-T-LINER HDX | 2016 to 2022 |
| WESTERN STAR 4700 | 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
| WESTERN STAR 4900 | 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
| WESTERN STAR 49X | 2017 to 2022 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 21V715000 | 2021-09-15. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM |
|---|---|
| 21V073000 | 2021-02-12. ENGINE |
| 2020408 | 2020-09-01. Engine |
| 20V527000 | 2020-09-01. ELECTRICAL SYSTEM:WIRING; ENGINE AND ENGINE COOLING |
| 18V581000 | 2018-08-30. ENGINE AND ENGINE COOLING:ENGINE:DIESEL |
| 16V416000 | 2016-06-09. ENGINE AND ENGINE COOLING:ENGINE:DIESEL |
| 2016285 | 2016-06-06. Engine |
| 2015484 | 2015-10-16. Engine |
| 15V620000 | 2015-10-02. ELECTRICAL SYSTEM:IGNITION:MODULE; ENGINE AND ENGINE COOLING:ENGINE |
| 2015336 | 2015-07-24. Engine |
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| CXA 03_26_Surge Tank | 2026-04-02. Other. CX Advocate for discolored coolant surge tanks (24CSA-20) |
|---|---|
| FleetCom_Heater Core | 2026-01-08. Other. Fleet Communications for Heater Core Plugging |
| TSB54-377-FTL | 2026-01-07. Service bulletin. Technical Service Bulletin Low Coolant Sensor |
| FleetCom_SS 3163-FTL | 2025-12-06. Other. Fleet Communications for Power Steering Reservoir Fill Cap Venting |
| FleetCom_Low Coolant | 2025-12-05. Other. Fleet Communications for Low Coolant Sensor |
| CXA_10_25_Low Coolant | 2025-11-05. Other. CX Advocate for P4, WST X-Series, DD Engines Low/Critical Low Coolant Warnings |
| CXA_10_25_Conmet Oil Pan | 2025-11-05. Other. CX Advocate for ConMet Oil Pan Insert Additional Issues |
| CXA_9_25_Tech Questions | 2025-10-03. Other. CX Advocate for technical questions/issues raised |
| CXA_8_25_Tech Questions | 2025-09-02. Other. CX Advocate for technical questions/issues raised |
| 24CSA-19Rev | 2025-09-02. Other. Revised Customer Service Annoucement for No Trouble Found Heavy Duty Engine Product (HDEP) Oil Separator Leaks |