# Service bulletin D21R1

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: 10191145
- Published by NHTSA: 2021\-05\-04
- Manufacturer's number: D21R1
- Manufacturer's date: 2021\-04\-06
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Detroit Emission Recall for GHG14 DETROIT DD13 with Two\-Box Aftertreatment Software Reprogramming. Certain Detroit Model Year 2013 to 2015 GHG14 DD13 engines that are registered in the state of California will require reprogramming to a minimum of the MCM and ACM software versions.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10191145-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10191145-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2015 FREIGHTLINER 114SD
- 2013 to 2015 FREIGHTLINER BUSINESS CLASS M2
- 2014 FREIGHTLINER CASCADIA
- 2015 WESTERN STAR 4900

## Recalls for the same vehicles and component

- [15V816000](/recalls/nhtsa/15V816000.md), 2015-12-07: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
- [2015336](/recalls/tc/2015336.md), 2015-07-24: Engine
- [15V343000](/recalls/nhtsa/15V343000.md), 2015-06-03: ENGINE AND ENGINE COOLING:ENGINE
- [14V680000](/recalls/nhtsa/14V680000.md), 2014-10-29: FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
- [2014050](/recalls/tc/2014050.md), 2014-02-21: Engine
- [14V080000](/recalls/nhtsa/14V080000.md), 2014-02-21: ENGINE AND ENGINE COOLING:ENGINE

## Other bulletins for the same vehicles and component

- [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
- [CXA 1\_16\_Turbo Oil Drain](/bulletins/11013206.md), 2025-01-29, Other: ENGINE. CX Advocate for turbo oil drain cracking
- [CXA 1\_16\_NOx](/bulletins/11013204.md), 2025-01-29, Other: ENGINE. CX Advocate for NOx conversion low faults
- [CXA 1\_16\_GATS2.4](/bulletins/11013201.md), 2025-01-29, Other: ENGINE. CX Advocate for GATS2.4 being expanding to DD15
- [CXA 1\_16\_DD13 Altitude](/bulletins/11013199.md), 2025-01-29, Other: ENGINE. CX Advocate for DD13 Gen 5 engines operating at high altitude experience EGR slow response fault.
- [ICI24\-051](/bulletins/11012298.md), 2025-01-03, Other: ENGINE. Important Campaign Information letter for DDC D24R4 \- Campaign Reactivated
- [ICI24\-050](/bulletins/11012297.md), 2025-01-03, Other: ENGINE. Important Campaign Information letter for DDC D24R4 \- Campaign Inactivated
- [D24R4\-OWN LTR](/bulletins/11011115.md), 2024-12-04, Emissions: ENGINE. Detroit Emission recall for GHG14 DETROIT DD16 Software Reprogramming

JSON: [/v1/bulletins/10191145](/v1/bulletins/10191145)

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