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Service bulletin 24-AT-002H

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 id10253275
Published by NHTSA2024-04-16
Manufacturer's number24-AT-002H
Manufacturer's date2024-04-09
NHTSA componentPOWER TRAIN

NHTSA's summary

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.

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
GENESIS G802017, 2018
GENESIS G902017, 2018
HYUNDAI ACCENT2012, 2013, 2014, 2015, 2016, 2017
HYUNDAI AZERA2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
HYUNDAI ELANTRA2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
HYUNDAI ELANTRA COUPE2013, 2014 (the catalog's model; the bulletin names a series or trim of it)
HYUNDAI ELANTRA GT2018, 2019, 2020
HYUNDAI EQUUS2011, 2012, 2013, 2014, 2015, 2016
HYUNDAI GENESIS2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
HYUNDAI GENESIS COUPE2010, 2011, 2012, 2013, 2014, 2015, 2016
HYUNDAI KONA2024
HYUNDAI PALISADE2020, 2021, 2022, 2023, 2024
HYUNDAI SANTA CRUZ2022, 2023, 2024
HYUNDAI SANTA FE HYBRID2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
HYUNDAI SANTA FE SPORT2013, 2014, 2015, 2016, 2017, 2018
HYUNDAI SONATA2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024
HYUNDAI SONATA HYBRID2016, 2017, 2018, 2019, 2020 (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, 2021, 2022, 2023, 2024
HYUNDAI TUCSON HYBRID2022 (the catalog's model; the bulletin names a series or trim of it)
HYUNDAI VELOSTER2013, 2014, 2015
HYUNDAI VELOSTER2019, 2020, 2021

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
20234142023-07-27. Powertrain
23V5260002023-07-27. POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:PUMP
20225682022-10-06. Powertrain
22V7460002022-10-06. POWER TRAIN:AUTOMATIC TRANSMISSION
20181352018-03-16. Powertrain
20164362016-09-08. Powertrain
16V6280002016-08-30. ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)
20160602016-02-08. Powertrain
16V0570002016-01-28. POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES

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
26-AT-005H TSB2026-06-16. Service bulletin. This bulletin provides information related to a Transmission Control Unit (TCU) software update for some vehicles equipped with an 8-speed wet dual clutch transmission (8WDCT). The software update revises the touch point learning variation, improving drivability and judder symptoms. Some 8WDCTs (indicated by a new part number) received an updated clutch spring. The correct TCU software update must be matched with the correct corresponding 8WDCT hardware, otherwise, drivability concerns may occur. This service procedure should be performed prior to any 8WDCT replacements done for drivability/judder concerns.
26-01-028H2026-03-30. Warranty extension. Certain Santa Cruz (NXT) vehicles equipped with 8-speed dual clutch transmissions (8DCT) may set one of the high pressure electric oil pump (HP EOP) DTCs listed below. This bulletin provides the service procedure to update the Transmission Control Unit (TCU) with improved logic to address these DTCs and enhance operation of the 8DCT.
26-AT-001H TSB2026-03-11. Service bulletin. Some Santa Cruz (NXT), Santa Fe (TMA, MX5A), and Sonata (DN8A) models may require replacement of the 8-speed wet dual clutch transmission (8WDCT) when the vehicle sets one of the high pressure electric oil pump (HP EOP) DTCs listed below. This bulletin provides instructions to replace the 8WDCT.
26-AT-002H2026-02-24. Service bulletin. Some Santa Fe (TMA) and Tucson (NX4A) vehicles equipped with a 2.5L GDI engine and 8 speed automatic transmission may have DTC U028700 (Lost Communication With Trans Fluid Pump Module) set by the transmission Electric Oil Pump (EOP). This DTC can cause the Idle Stop & Go (ISG) system to become inoperative. Follow the procedure in this bulletin to replace the Electric Oil Pump on affected vehicles.
25-01-042H TSB2025-07-15. Service campaign. Certain 2024MY Kona Electric (SX2 EV) and 2023-2024MY IONIQ 5 (NE EV) vehicles are equipped with a Motor and Reduction Gear System, also known as Motor-Gear Driven Unit (MGDU), that may have received an incorrect amount of oil/fluid during manufacturing. In some cases, the motor and/or reduction gear can produce a grinding/whining noise during operation. Follow the procedures in this bulletin to drain the existing oil and replace it with new oil to resolve this condition.
25-AT-001H TSB2025-06-03. Service bulletin. Certain Santa Fe (TMA) and Sonata (DN8/DN8A) vehicles equipped with 8-speed dual clutch transmissions (8DCT) may exhibit one of the DTCs listed below, related to the high pressure electric oil pump (HP EOP). Follow the procedures in this TSB to update the Transmission Control Unit (TCU) to the latest sensorless logic on affected vehicles, and then perform air bleeding and transmission learning.
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-001H-12024-12-21. Service bulletin. This bulletin provides the procedure for updating the automatic transmission TCU (Transmission Control Unit) software to improve shift quality, judder and hesitation when accelerating.
24-DS-001G-1 TSB2024-11-05. Service bulletin. Certain GV70 (JK1, JK1A), GV80 (JX1) and G80 (RG3) vehicles may have a hum or whine noise condition from the rear differential at certain speeds. This bulletin describes the procedure to inspect the vehicle for the hum or whine noise and if necessary to tighten the rear differential lock nut first. If the hum or whine noise remains, then replace the rear differential or other driveline components as necessary.
21-AT-010HG2024-04-11. Service bulletin. This TSB provides a procedure to replace the solenoids listed below for slipping, shift flare and/or harsh shift during the 2~3, 3~4 or 4~5 upshift.