# Service bulletin WI21\-006

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: 10187444
- Published by NHTSA: 2021\-02\-26
- Manufacturer's number: WI21\-006
- Manufacturer's date: 2021\-02\-15
- NHTSA component: ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT

## NHTSA's summary

Warranty Information Letter for Detroit NOx Sensor Circuit Fault Codes \- Claim Guidelines.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10187444-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10187444-9999.pdf)

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

## Components

Electrical system, Engine, Equipment and accessories

## Vehicles listed

- 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 4900
- 2021 WESTERN STAR 49X
- 2015 to 2022 WESTERN STAR 5700
- 2015 to 2021 WESTERN STAR 6900

## Recalls for the same vehicles and component

- [2026091](/recalls/tc/2026091.md), 2026-03-03: Electrical
- [22V338000](/recalls/nhtsa/22V338000.md), 2022-05-16: EQUIPMENT:OTHER:LABELS
- [22V101000](/recalls/nhtsa/22V101000.md), 2022-02-22: SERVICE BRAKES; ELECTRICAL SYSTEM:SOFTWARE
- [2021697](/recalls/tc/2021697.md), 2021-11-12: Electrical
- [21V882000](/recalls/nhtsa/21V882000.md), 2021-11-12: ELECTRICAL SYSTEM:WIRING
- [21V715000](/recalls/nhtsa/21V715000.md), 2021-09-15: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
- [2021399](/recalls/tc/2021399.md), 2021-06-25: Electrical
- [21V481000](/recalls/nhtsa/21V481000.md), 2021-06-25: ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES
- [2021172](/recalls/tc/2021172.md), 2021-03-24: Electrical
- [21V206000](/recalls/nhtsa/21V206000.md), 2021-03-24: ELECTRICAL SYSTEM:WIRING

## Other bulletins for the same vehicles and component

- [SS 3175\-FTL](/bulletins/11031986.md), 2026-05-02, Other: ELECTRICAL SYSTEM. Service Solution for Progressive Low Voltage Disconnect Parameter Update
- [SS 3146\-FTL](/bulletins/11031985.md), 2026-05-02, Other: ELECTRICAL SYSTEM. Service Solution for M2, 108SD, 114SD \- Unable to Program Replacement Bulkhead Module \- Certain Model Years
- [SS 3124\-FTL](/bulletins/11031974.md), 2026-05-02, Other: ELECTRICAL SYSTEM. Service Solution for Legacy M2 Bulkhead Module \(BHM\) Replacement and DiagnosticLink Issues
- [FleetCom 1\_Solenoid](/bulletins/11031966.md), 2026-05-02, Other: ELECTRICAL SYSTEM. Fleet Communications for solenoid issues
- [CXA 03\_26\_Surge Tank](/bulletins/11030507.md), 2026-04-02, Other: ENGINE. CX Advocate for discolored coolant surge tanks \(24CSA\-20\)
- [FleetCom\_ECU Faults](/bulletins/11028287.md), 2026-02-05, Other: ELECTRICAL SYSTEM. Fleet Communications for Intermittent Connections and ECU Fault Codes
- [FleetCom\_Heater Core](/bulletins/11027493.md), 2026-01-08, Other: ENGINE. Fleet Communications for Heater Core Plugging
- [FleetCom\_ECU Faults](/bulletins/11027492.md), 2026-01-08, Other: ELECTRICAL SYSTEM. Fleet Communications for Corrosion Protecton/Glyptal Application
- [TSB54\-377\-FTL](/bulletins/11027199.md), 2026-01-07, Service bulletin: ENGINE. Technical Service Bulletin Low Coolant Sensor
- [FleetCom\_SS 3174\-FTL](/bulletins/11026469.md), 2025-12-06, Other: ELECTRICAL SYSTEM. Fleet Communication for SS 3174\-FTL

JSON: [/v1/bulletins/10187444](/v1/bulletins/10187444)

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