Service bulletin TSB_TRA095

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10190939
Published by NHTSA	2021-05-04
Manufacturer's number	TSB_TRA095
Manufacturer's date	2021-04-26
NHTSA component	POWER TRAIN

NHTSA's summary

TECHNICAL SERVICE BULLETIN: 3.3L GDI 8AT TCU GEAR SHIFT LOGIC IMPROVEMENT - This bulletin provides the procedure to improve the gear shift logic of the Transmission Control Unit (TCU) on some 2019MY Sorento (UMa) vehicles produced from January 24, 2018 through September 24, 2018, equipped with Lambda 3.3L GDI engine and 8-speed automatic transmission, which may exhibit symptoms of acceleration delay and hesitation after vehicle speed is reduced and close to 0 mph.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Vehicles listed
KIA SORENTO	2019

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
TSB_TRA046_R5	2025-04-23. Service bulletin. TECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced, and the transmission oil cooler is transferred to the new transmission.
TSB_TRA046_R4	2024-06-04. Service bulletin. This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced.
PS750	2023-10-01. Service bulletin. PITSTOP: AWD SYSTEM CONCERN DUE TO TIRE CIRCUMFERENCE - This Pitstop provides information regarding potential concerns with the All-Wheel-Drive (AWD) system due to tire sizes of differing circumference. Some customers may complain of a chatter sensation felt in the drivetrain of the vehicle and/or the failure of drivetrain component(s). A difference in tire size (width, aspect ratio, construction, rim diameter etc.) may be the cause.
TSB_TRA046_R3	2022-12-06. Service bulletin. TECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE - This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced, refer to applicable vehicles in the chart starting on page 2.
TSB_TRA046_R1	2020-05-05. Service bulletin. TECHNICAL SERVICE BULLETIN: - TRANSMISSION FLUID APPLICATION GUIDE - This bulletin has been revised to include additional information. This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced, refer to applicable vehicles on page 2. Refer to the shop manual on KGIS for the specific Kia model for the correct transmission fluid check/fill procedures.
TSBTRA086	2019-12-09. Service bulletin. TECHNICAL SERVICE BULLETIN - PARTIAL REPAIR OF 4WD COUPLING - This bulletin provides the procedure information regarding the partial repair of the Four Wheel Drive (4WD) Coupling Assembly, Pressure Sensor, Actuator Motor or 4WD harness on some 2011-2020 Sportage (SL, QL) and 2013-2020MY Sorento (XMa, UMa) 4WD vehicles for a concern regarding: • Oil leakage from the 4WD coupling assembly • 4WD Malfunction and MIL lamp ON with DTCs • Abnormal noise or vibration while driving
TSBTRA082_R1	2019-08-07. Service bulletin. TSB: SERVICE ACTION: 3.3L GDI 8AT TCU LOGIC IMPROVEMENT FOR DTC P0741(SA387) - This bulletin has been revised to include additional information. This bulletin provides the procedure to improve the logic of the Transmission Control Unit (TCU) software on some 2019MY Sorento (UMa) vehicles produced from January 24, 2018 through March 26, 2019, and Sedona (YP) produced from February 14, 2018 through October 15, 2018, which may experience a malfunction indicator lamp (MIL) ON with DTC P0741.
TSBTRA082	2019-06-04. Service bulletin. TSB: SERVICE ACTION: 3.3 GDI 8AT TCU LOGIC IMPROVEMENT FOR DTC P0741(SA387) - This bulletin provides the procedure to improve logic of the TCU (Transmission Control Unit) software on some 2019MY Sorento (UMa) 3.3L vehicles produced from January 24, 2018 to March 26, 2019, which may experience a malfunction indicator lamp (MIL) ON with DTC P0741. To correct this concern, apply the improved logic to the TCU using the KDS ECU Upgrade function as described in this bulletin.