# Service bulletin TSBTRA071A

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: 10126430
- Published by NHTSA: 2017\-12\-22
- Manufacturer's number: TSBTRA071A
- Manufacturer's date: 2017\-11\-16
- NHTSA component: POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)

## NHTSA's summary

TSB \- SERVICE ACTION: SHIFT QUALITY LOGIC IMPROVEMENT \(SA315A\) \- This bulletin provides the procedure to improve the logic of the Transmission Control Unit \(TCU\) on some 2018MY Optima \(JFa\) 2.0T, produced from April 19, 2017 through July 10, 2017, and some 2018MY Sorento \(UMa\) 3.3L vehicles, produced from March 31, 2017 through July 25, 2017, which may experience a shift quality concern, such as a hard downshift, upshift, and/or shift delay.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2017/MC-10126430-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2017/MC-10126430-0001.pdf)

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

## Components

Transmission and driveline, Automatic transmission, Transmission control module

## Vehicles listed

- 2018 KIA OPTIMA
- 2018 KIA SORENTO

## Other bulletins for the same vehicles and component

- [TSBENG177B\_R1](/bulletins/10128621.md), 2018-02-12, Service bulletin: POWER TRAIN:MANUAL TRANSMISSION; POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION. TSB \- SERVICE ACTION: 2.4L SHIFT QUALITY \& WAKE\-UP LOGIC IMPROVEMENT \(SA316B\) \- This bulletin provides the procedure to improve the logic of the Electronic Control Unit \(ECU\) and Transmission Control Unit \(TCU\) on some 2018MY Optima \(JFa\) 2.4L, produced from April 18, 2017 through September 7, 2017, and some 2017MY Sorento \(UMa\) 2.4L vehicles, produced from March 31, 2017 through December 6, 2017, which may experience an extended crank and/or a shift quality concern, such as a hard downshift, upshift, and/or shift delay.
- [TSBTRA071AR1](/bulletins/10126431.md), 2017-12-22, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); POWER TRAIN. TSB \- SERVICE ACTION: 2.0t \& 3.3l SHIFT QUALITY LOGIC IMPROVEMENT \(SA315A\) \- This bulletin provides the procedure to improve the logic of the Transmission Control Unit \(TCU\) on some 2018MY Optima \(JFa\) 2.0T, produced from April 19, 2017 through July 10, 2017, and some 2018MY Sorento \(UMa\) 2.0T and 3.3L vehicles, produced from March 23, 2017 through September 18, 2017, which may experience a shift quality concern, such as a hard downshift, upshift, and/or shift delay.
- [TSBTRA071](/bulletins/10126429.md), 2017-12-22, Service bulletin: POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). TSB \- SERVICE ACTION: 2.0T \& 3.3L SHIFT QUALITY LOGIC IMPROVEMENT \(SA315\) \- CLOSED \- This bulletin provides the procedure to improve the logic of the Transmission Control Unit \(TCU\) on some 2018MY Optima \(JFa\) 2.0T, produced from April 19, 2017 through July 10, 2017, and some 2018MY Sorento \(UMa\) 2.0T and 3.3L vehicles, produced from March 31, 2017 through July 25, 2017, which may experience a shift quality concern, such as a hard downshift, upshift, and/or shift delay.

JSON: [/v1/bulletins/10126430](/v1/bulletins/10126430)

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