# Service bulletin 20OEM\-04

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: 10176791
- Published by NHTSA: 2020\-06\-26
- Manufacturer's number: 20OEM\-04
- Manufacturer's date: 2020\-06\-25
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

OEM and distributor announcement for Running Change to ACM Software for MY2020. There is an upcoming running change \(RC1\) for ACM software that will be installed when OEMs or distributors program with DiagnosticLink. The hardware part number for the ACM module will remain the same \(A 000 446 97 54\). OEMs are instructed to continue ordering the same ACM hardware part number.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10176791-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10176791-9999.pdf)

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

## Components

Engine

## Vehicles listed

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

## Recalls for the same vehicles and component

- [2020408](/recalls/tc/2020408.md), 2020-09-01: Engine
- [20V527000](/recalls/nhtsa/20V527000.md), 2020-09-01: ELECTRICAL SYSTEM:WIRING; ENGINE AND ENGINE COOLING

## Other bulletins for the same vehicles and component

- [FleetCom\_Heater Core](/bulletins/11027493.md), 2026-01-08, Other: ENGINE. Fleet Communications for Heater Core Plugging
- [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 3\_25\_NOx](/bulletins/11016309.md), 2025-04-02, Other: ENGINE. CX Advocate for NOx conversion low faults
- [CXA 2\_25\_Turbo Oil Drain](/bulletins/11014819.md), 2025-03-04, Other: ENGINE. CX Advocate for turbo oil drain cracking
- [CXA 2\_25\_NOx](/bulletins/11014818.md), 2025-03-04, Other: ENGINE. CX Advocate for NOx conversion low faults
- [MYCOM\_02102025\-1](/bulletins/11014786.md), 2025-03-04, Other: ENGINE. My Communications for Variable Speed Coolant Pump for DD13 Engines \- Cascadia/57X Only
- [TSB01\-001\-DDC](/bulletins/11014775.md), 2025-03-04, Service bulletin: ENGINE. Technical Service Bulletin for GHG17 and Newer DD Platform Heavy Duty Oil Pan Drain Plug Inserts

JSON: [/v1/bulletins/10176791](/v1/bulletins/10176791)

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