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Service bulletins for the 2012 Hyundai Sonata

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.

230 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Automatic transmission are shown. Show all

Bulletins, newest first
19-AT-015H2019-09-30. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE. If you are servicing an applicable vehicle with a ?Check Engine? light on and one or more of the DTC listed below, follow the repair procedure and replace the related solenoid and oil pressure harness
5NP-P5L7D-052018-05-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; EQUIPMENT. If you are servicing a vehicle with a harsh and/or delayed shift, use the GDS as shown in the Service Procedure to measure shift engagement time.
5NP-Z6F3A-112017-11-14. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. Before installing an automatic transmission, check the depth of the torque converter in the case to confirm the torque converter is fully installed in the transmission. If this is not done, the oil pump may be damaged.
5NP-S9D9P-102016-10-18. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. THIS BULLETIN PROVIDES INFORMATION ON COMPONENTS, ATTRIBUTES, AND PRECAUTIONS OF THE 7-SPEED DRY-TYPE DUAL CLUTCH TRANSMISSION (DCT).
5NP-B6E2P-102016-10-14. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN:AXLE ASSEMBLY. "THE PCM OR TCM CONTAINS LOGIC TO ADJUST SOLENOID DUTY AND LINE PRESSURE AS NEEDED TO COMPENSATE FOR NORMAL CLUTCH WEAR OVER THE LIFE OF THE TRANSAXLE. THIS BULLETIN PROVIDES THE PROCEDURES NECESSARY TO RESET (ERASE) AND RELEARN THE PCM/TCM ADAPTIVE VALUES. AFTER THE FOLLOWING REPAIRS HAVE BEEN COMPLETED, THE PCM/TCM ADAPTIVE VALUES MUST BE RESET IN ORDER TO PROVIDE OPTIMUM SHIFT QUALITY. IF THE PROCEDURE IS NOT PERFORMED, THE TRANSMISSION MAY EXPERIENCE A SHIFT FLARE OR HARSH SHIFT. H REPLACE AUTOMATIC TRANSAXLE OR PCM/TCM H REPROGRAM OR EXCHANGE A PCM/TCM FROM ANOTHER VEHICLE"
5NP-E9K5G-092016-09-29. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ELECTRICAL SYSTEM:SOFTWARE. THIS BULLETIN PROVIDES INFORMATION RELATED TO THE TCU AND HCU SOFTWARE UPDATE FOR CERTAIN 2011~15 SONATA HYBRID (YF-HEV) VEHICLES WITH IMPROVED 100 MESH SOLENOIDS. THESE UPDATES MUST BE PERFORMED FOR THE PART NUMBERS SHOWN BELOW ONLY AFTER THE TRANSMISSION HAS BEEN REPLACED.
16-AT-0022016-06-22. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
TSB-13-AT-0082013-06-18. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ELECTRICAL SYSTEM:STARTER ASSEMBLY:SOLENOID. HYUNDAI: INFORMATION HAS BEEN PROVIDED REGARDING PROCEDURE IN REPAIRING AND REPLACING RELATED PART TO TRANSMISSION SOLENOID DTC FOR CERTAIN VEHICLES. MODELS 2010-2013 TUCSON, SANTA FE, 2011-2013 SONATA, ELANTRA, AZERA, 2012-2013 ACCENT, 2013 VELOSTER. *PE
TSB-13-FL-0012013-06-18. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). HYUNDAI: DUE TO AN ERROR IN THE INTERNAL CONTROL MODULE READ ONLY MEMORY, INFORMATION IS PROVIDED REGARDING THE REPLACING OF THE PCM AND A POSSIBLE WARRANTY CLAIM. MODELS 2011-2013 ELANTRA, 2010-2013 GENESIS COUPE, 2010-2013 SANTA FE, 2006-2013 SONATA, 2010-2013 TUCSON. *PE

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.