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Service bulletins for the 2012 Hyundai Equus

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.

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

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Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
24-AT-002H2024-04-16. Service bulletin. POWER TRAIN. 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.
21-AT-018H2021-12-09. Service bulletin. POWER TRAIN. This bulletin describes the procedure to replace the 35R and 4&OD solenoids for a shift flare and/or harsh shift during the 2~3, 3~4 or 4~5 upshift.
20-AT-016H2020-05-07. Service bulletin. POWER TRAIN; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT ADAPTIVE/MOBILITY. The automatic transmission warranty repair policy authorizes in-dealership repairs of the following components for both OEM (new) and remanufactured automatic transmissions:
19-AT-021H-12020-01-21. Service bulletin. POWER TRAIN; EQUIPMENT. 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.
19-AT-014H2019-07-29. Service bulletin. POWER TRAIN. This bulletin provides a procedure to diagnose an 8-speed automatic transaxle with a harsh and/or delayed shift using GDS.
19-AT-008H2019-05-20. Service bulletin. ENGINE; POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION. When servicing a vehicle with a ?Check Engine light? and any of the DTCs listed below, follow the Service Procedure and replace the related solenoid and E-module.
19-FL-003H2019-05-20. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. This bulletin provides the procedure to write the Vehicle Identification Number (VIN) during the replacement of the Engine Control Module (ECM) or Powertrain Control Module (PCM). Once the VIN has been programmed to the ECM/PCM, it cannot be removed or overwritten.
19-AT-007H2019-05-20. Service bulletin. POWER TRAIN; EQUIPMENT; POWER TRAIN:AUTOMATIC TRANSMISSION. This bulletin provides a procedure to transfer oil pressure data to the TCU using GDS Mobile. This procedure is necessary to reduce the TCU learning time and improve the shift quality.
5NP-H3D9Z-032017-08-10. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES. The following vehicles are equipped with an 8-speed automatic transmission. The ATF level can be checked by the procedure shown below.
5NP-D2Y6N-122017-01-26. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. "UPDATE THE WARRANTY INFORMATION. DESCRIPTION: DO NOT REPLACE THE TRANSMISSION FOR THE DTC LISTED BELOW. INSTEAD, FOLLOW THE REPAIR PROCEDURE AND REPLACE THE E-MODULE."
5NP-W7J6Y-112017-01-26. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. "AUTOMATIC TRANSMISSION SOLENOID & SENSOR REPLACEMENT FOR DTC P0741, P0743, P0748, P0753, P0758, P075A, P0763, P0768, P0773, P2709 & P0841"
5NP-J4N8R-012017-01-25. Service bulletin. VEHICLE SPEED CONTROL; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; POWER TRAIN:AUTOMATIC TRANSMISSION. DO NOT REPLACE THE TRANSMISSION FOR THE DTC LISTED. INSTEAD, FOLLOW THE REPAIR PROCEDURE AND REPLACE THE E-MODULE.
5NP-Q9X6P-102016-10-14. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. THIS BULLETIN PROVIDES A PROCEDURE TO TRANSFER PRESSURE DATA TO THE TCM USING GDS MOBILE. THIS PROCEDURE IS NECESSARY TO REDUCE THE TCM LEARNING TIME AND IMPROVE THE SHIFT QUALITY.
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"
14-AT-006-12016-03-31. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
14-AT-0052016-03-31. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
14-AT-0072016-03-16. Service bulletin. EQUIPMENT; POWER TRAIN:AUTOMATIC TRANSMISSION. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
TSB-13-AT-0152013-11-06. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). HYUNDAI: PROCEDURES PROVIDED REGARDING THE INSPECTION AND REPLACEMENT OF INHIBITOR SWITCH DUE TO AN IMPROPERLY ADJUSTED OR IMPROPERLY OPERATING INHIBITOR SWITCH (RANGE SWITCH) WHEN MALFUNCTION INDICATOR LIGHT (MIL) IS ILLUMINATED OR NO ENGINE CRANK IN P OR N. MODELS 2012-2013 GENESIS, EQUUS. *PE
TSB-13-AT-002-12013-09-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). HYUNDAI: INFORMATION HAS BEEN PROVIDED REGARDING PROCEDURE IN REPAIRING AND REPLACING RELATED PART TO TRANSMISSION SOLENOID DTC, BUT DO NOT REPLACE TRANSMISSION FOR DTC LISTED. MODEL 2012 GENESIS, EQUUS, 2013 GENESIS. *PE
12-AT-0112012-05-17. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. HYUNDAI: AUTOMATIC TRANSAXLE HARSH AND/OR DELAYED SHIFT- GDS ANALYSIS. ALSO INCLUDED MODEL GENESIS COUPE MODEL YEAR 2012. *JS

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