# Service bulletin TechTalk8134

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: 10189971
- Published by NHTSA: 2021\-04\-06
- Manufacturer's number: TechTalk8134
- Manufacturer's date: 2021\-03\-09
- NHTSA component: POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE AND ENGINE COOLING

## NHTSA's summary

Tech Talk continuing discussion on SCR conversion codes only when bobtailing.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10189971-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10189971-9999.pdf)

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

## Components

Engine, Transmission and driveline, Automatic transmission

## Vehicles listed

- 2020 FREIGHTLINER CASCADIA

## Recalls for the same vehicles and component

- [19V137000](/recalls/nhtsa/19V137000.md), 2019-02-27: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION \(PRNDL\)

## Other bulletins for the same vehicles and component

- [20TS\-07](/bulletins/10181369.md), 2020-10-21, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ENGINE AND ENGINE COOLING. Technical Service Letter for Cold Weather Faults on GHG17/21 DD13 with MCM Software Version 14. Due to colder weather, there may be an increase in the frequency of faults, noted below, on GHG17/21 DD13 trucks built after June 5th 2019. This is due to a calibration issue in the current MCM software \(14.1.1.5 or 14.2.1.3\). New software is scheduled for release in the first quarter of 2021 that will address these faults.
- [sb2652 DT12 PTO](/bulletins/10158006.md), 2019-04-08, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT; ELECTRICAL SYSTEM:WIRING; EQUIPMENT ADAPTIVE/MOBILITY. DT12 PTO Upfit
- [DOC\-1034166](/bulletins/10157990.md), 2019-04-08, Service bulletin: EQUIPMENT; POWER TRAIN:AUTOMATIC TRANSMISSION; EQUIPMENT ADAPTIVE/MOBILITY. SS 1034166 New Cacadia With Cummins Engine and Eaton UltraShift PTO Engagement

JSON: [/v1/bulletins/10189971](/v1/bulletins/10189971)

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