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Service bulletin 19-AT-021H-1

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)
TypeService bulletin
NHTSA id10170511
Published by NHTSA2020-01-21
Manufacturer's number19-AT-021H-1
Manufacturer's date2019-12-17
NHTSA componentPOWER TRAIN; EQUIPMENT

NHTSA's summary

If you are servicing a vehicle with a transmission slipping concern, follow the Service Procedure shown below and perform a stall test. This TSB provides a procedure to test each clutch in the transmission. If the vehicle fails the stall test, replace the transmission. ? PASS: Stall speed is between 1700~2900 rpm (See shop manual for stall speed). ? FAIL: Engine revs to redline limit (6,000~6,500 rpm). If so, replace the transmission.

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

Equipment and accessories, Transmission and driveline

Vehicles listed
HYUNDAI ACCENT2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
HYUNDAI AZERA2011, 2012, 2013, 2014, 2015, 2016, 2017
HYUNDAI ELANTRA2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
HYUNDAI ELANTRA GT2013, 2014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
HYUNDAI ELANTRA GT2017, 2018, 2019
HYUNDAI EQUUS2012, 2013, 2014, 2015, 2016
HYUNDAI GENESIS2012, 2013, 2014, 2015, 2016
HYUNDAI GENESIS COUPE2013, 2014, 2015, 2016
HYUNDAI KONA2018, 2019, 2020
HYUNDAI PALISADE2020
HYUNDAI SANTA FE2010, 2011, 2012
HYUNDAI SANTA FE2019, 2020
HYUNDAI SANTA FE SPORT2013, 2014, 2015, 2016, 2017, 2018
HYUNDAI SONATA2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
HYUNDAI SONATA HYBRID2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 (the catalog's model; the bulletin names a series or trim of it)
HYUNDAI SONATA PLUG-IN HYBRID2016, 2017, 2018, 2019 (the catalog's model; the bulletin names a series or trim of it)
HYUNDAI TUCSON2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
HYUNDAI VELOSTER2013, 2014, 2015
HYUNDAI VELOSTER2019, 2020

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

Recalls for the same vehicles and component
20244312024-07-25. Powertrain
20224722022-08-19. Accessories
20221182022-03-15. Accessories
20V3930002020-07-02. EQUIPMENT:ELECTRICAL
20V0220002020-01-17. EQUIPMENT:OTHER:LABELS
20181352018-03-16. Powertrain
20164362016-09-08. Powertrain
16V6280002016-08-30. ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)
20161252016-03-21. Accessories
20160602016-02-08. Powertrain

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
TXXZ OL2025-03-01. Warranty extension. Certain 2014 – 2015 model year Tucson vehicles may have a weakened weld at the zone where the center muffler is attached to the exhaust pipe. This condition may cause the center muffler to detach from the exhaust pipe. At Hyundai, we are committed to providing vehicles of outstanding quality and value. In an effort to meet this commitment, Hyundai is extending the warranty coverage for the center muffler assembly under this condition to 15 years / 150,000 miles from the date of original retail delivery or date of first use and is valid for original and subsequent owners.
24-AT-002H2024-04-16. Service bulletin. This TSB provides a procedure to diagnose and replace, if necessary, an automatic transmission with Incorrect Ratio DTC (transmission clutch slip in gear above limit) listed on Page 2.
24-01-009H2024-03-05. Service bulletin. This bulletin provides the service procedure to: 1) Upgrade the IBU/BCM (Integrated Body Control Unit/Body Control Module) to revise the OEM Hyundai burglar alarm system operation and ignition start logic and 2) Install two anti-theft decals for the front windows. Additional decals may also be installed in the rear windows at customer’s discretion.
24-01-009H2024-03-05. Service bulletin. Hyundai has launched an anti-theft software upgrade and window decal campaign (Campaign 993), combined with an anti-theft steering wheel lock campaign (Campaign P32), and anti-theft ignition cylinder protector campaign (Campaign 9A5) in response to an increase in thefts of certain 2011-2022MY Hyundai vehicles not equipped with engine immobilizers targeted through social media. For certain vehicles that cannot be upgraded with the software (Campaign 993), Hyundai is offering customers an anti-theft ignition cylinder protector to be installed on their vehicle. This Dealer Best Practices Guide provides information to assist dealership personnel with customer questions relating to the immobilizer software upgrade, window decals and steering wheel lock anti-theft solutions available from HMA through Hyundai dealers.
23-AT-006H-22023-11-30. Service bulletin. This TSB provides information to diagnose the push button shifter operation.
23-01-073H-12023-11-07. Service bulletin. Certain 19-23MY Kona Electric (OS EV) vehicles may experience a condition of EV warning light ON with DTC P1AA6 to P1AAF found stored. The Battery Management System (BMS) software update will be performed to enhance battery diagnostics logic. Flowchart summary of the service procedure is provided on page 2 summarized as follows: • Vehicles that do not have EV Warning Light On will only need the BMS software update. • Certain vehicles incurring EV Warning Light On and DTC P1AA6 found stored with Freeze Frame Data Information Code 1=128 will only require the BMS Update. • Certain other DTC P1AA6 Information Code 1-2 values or DTC P1AA7 to P1AAF will require the Battery System Assembly (BSA) to be replaced and then the BMS Update to be performed.
23-01-073H-12023-11-07. Service bulletin. Certain 19-23MY Kona Electric (OS EV) vehicles may experience a condition of EV warning light ON with Diagnostic Trouble Code (DTC) P1AA6 to P1AAF found stored. The Battery Management System (BMS) software update will be performed to enhance battery diagnostics logic. The service procedure contained in TSB 23-01-073H-1 (or latest version) is summarized as follows: • Vehicles that do not have EV Warning Light “ON” will only need the BMS software update. • Certain vehicles incurring EV Warning Light “ON” and DTC P1AA6 found stored with Freeze Frame Data Information Code 1=128 will only require the BMS Update. • Certain other DTC P1AA6 Information Code 1-2 values or DTC P1AA7 to P1AAF will require the Battery System Assembly (BSA) to be replaced and then the BMS Update to be performed.
23-01-054H2023-10-02. Service bulletin. Certain 2013-2015MY Sonata Hybrid (YF HEV) vehicles may exhibit warning lights on while driving and the inability to restart the ignition after it has been turned off when stopped. TSB 23-01-054H outlines the service process to inspect the fuse and safety plug assembly, and replace the parts as needed. This best practice provides helpful tips and key notes when carrying out this service campaign.
23-01-054H2023-10-02. Service bulletin. Certain Sonata Hybrid (YF HEV) vehicles may exhibit warning lights on while driving and the inability to restart the ignition after it has been turned off when stopped. This bulletin provides the procedure to inspect the safety plug and fuse and replace parts as necessary.
23-AT-008H-12023-10-02. Service bulletin. If you are servicing an 8-speed front-wheel-drive vehicle equipped with automatic transaxle with one or more of the DTC or symptoms listed below, refer to the Service Procedure to diagnose the condition. • DIAGNOSTIC TROUBLE CODES: ➢ P070500 - Transmission range sensor circuit malfunction ➢ P070512 - Transmission range sensor circuit malfunction ➢ P070514 - Transmission range sensor circuit malfunction ➢ P07051C - Transmission range sensor circuit malfunction ➢ P070600 - Transmission range sensor circuit range/performance ➢ P070661 - Transmission range sensor circuit range/performance ➢ P070696 - Transmission range sensor circuit range/performance • SYMPTOMS: ➢ Malfunction Indicator Light (MIL) illuminated ➢ 5th gear fail-safe ➢ Intermittently won’t shift into D or R ➢ Intermittently won’t shift out of Park ➢ Intermittent ly no engine cr ank/n o start in “P” or “N” with or without MIL or DTC.