# Service bulletin 21OEM\-06

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: 10187835
- Published by NHTSA: 2021\-03\-01
- Manufacturer's number: 21OEM\-06
- Manufacturer's date: 2021\-02\-19
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Starting on November 23, 2020, DiagnosticLink 8.13 \(Build 4527\) was made available. Current subscribers of DiagnosticLink 8.11 or 8.12 may upgrade to DiagnosticLink 8.13 at no cost. All DTNA Service shops \& OEM locations are required to maintain the latest version of software on each of their stations.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10187835-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10187835-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2015 to 2022 FCCC MT45
- 2015 to 2022 FCCC MT55
- 2015 to 2017 FCCC S2G
- 2019 to 2020 FCCC S2G
- 2017 to 2021 FCCC S2RV
- 2015 to 2021 FCCC XBP
- 2015 to 2021 FCCC XBR
- 2015 to 2021 FCCC XBS
- 2015 to 2021 FCCC XCL
- 2015 to 2021 FCCC XCM
- 2015 to 2021 FCCC XCP
- 2015 to 2021 FCCC XCR
- 2015 to 2021 FCCC XCS
- 2018 FCCC redundant S2G
- 2015 to 2021 FREIGHTLINER 108SD
- 2015 to 2021 FREIGHTLINER 114SD
- 2015 to 2021 FREIGHTLINER 122SD
- 2015 to 2021 FREIGHTLINER BUSINESS CLASS M2
- 2015 to 2022 FREIGHTLINER CASCADIA
- 2019 to 2021 FREIGHTLINER ECONIC SD
- 2015 to 2022 THOMAS BUILT BUSES SAF\-T\-LINER C2
- 2015 to 2021 WESTERN STAR 4700
- 2015 to 2021 WESTERN STAR 4800
- 2015 to 2021 WESTERN STAR 4900
- 2021 WESTERN STAR 49X
- 2015 to 2022 WESTERN STAR 5700
- 2015 to 2021 WESTERN STAR 6900

## Recalls for the same vehicles and component

- [21V715000](/recalls/nhtsa/21V715000.md), 2021-09-15: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
- [21V073000](/recalls/nhtsa/21V073000.md), 2021-02-12: ENGINE
- [2020408](/recalls/tc/2020408.md), 2020-09-01: Engine
- [20V527000](/recalls/nhtsa/20V527000.md), 2020-09-01: ELECTRICAL SYSTEM:WIRING; ENGINE AND ENGINE COOLING
- [18V581000](/recalls/nhtsa/18V581000.md), 2018-08-30: ENGINE AND ENGINE COOLING:ENGINE:DIESEL
- [16V416000](/recalls/nhtsa/16V416000.md), 2016-06-09: ENGINE AND ENGINE COOLING:ENGINE:DIESEL
- [2016285](/recalls/tc/2016285.md), 2016-06-06: Engine
- [15V816000](/recalls/nhtsa/15V816000.md), 2015-12-07: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
- [2015484](/recalls/tc/2015484.md), 2015-10-16: Engine
- [15V620000](/recalls/nhtsa/15V620000.md), 2015-10-02: ELECTRICAL SYSTEM:IGNITION:MODULE; ENGINE AND ENGINE COOLING:ENGINE

## Other bulletins for the same vehicles and component

- [CXA 03\_26\_Surge Tank](/bulletins/11030507.md), 2026-04-02, Other: ENGINE. CX Advocate for discolored coolant surge tanks \(24CSA\-20\)
- [FleetCom\_Heater Core](/bulletins/11027493.md), 2026-01-08, Other: ENGINE. Fleet Communications for Heater Core Plugging
- [TSB54\-377\-FTL](/bulletins/11027199.md), 2026-01-07, Service bulletin: ENGINE. Technical Service Bulletin Low Coolant Sensor
- [FleetCom\_SS 3163\-FTL](/bulletins/11026453.md), 2025-12-06, Other: ENGINE. Fleet Communications for Power Steering Reservoir Fill Cap Venting
- [FleetCom\_Low Coolant](/bulletins/11026421.md), 2025-12-05, Other: ENGINE. Fleet Communications for Low Coolant Sensor
- [CXA\_10\_25\_Low Coolant](/bulletins/11024962.md), 2025-11-05, Other: ENGINE. CX Advocate for P4, WST X\-Series, DD Engines Low/Critical Low Coolant Warnings
- [CXA\_10\_25\_Conmet Oil Pan](/bulletins/11024958.md), 2025-11-05, Other: ENGINE. CX Advocate for ConMet Oil Pan Insert Additional Issues
- [CXA\_9\_25\_Tech Questions](/bulletins/11023683.md), 2025-10-03, Other: POWER TRAIN; ENGINE. CX Advocate for technical questions/issues raised
- [CXA\_8\_25\_Tech Questions](/bulletins/11022341.md), 2025-09-02, Other: POWER TRAIN; ENGINE; UNKNOWN OR OTHER. CX Advocate for technical questions/issues raised
- [24CSA\-19Rev](/bulletins/11022317.md), 2025-09-02, Other: ENGINE. Revised Customer Service Annoucement for No Trouble Found Heavy Duty Engine Product \(HDEP\) Oil Separator Leaks

JSON: [/v1/bulletins/10187835](/v1/bulletins/10187835)

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