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.
By type
By component
By trouble code
By topic
| Campaign 953 ECM | 2019-04-22. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Hyundai has launched a Product Improvement Campaign to perform a knock sensor software update on applicable vehicles. |
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| Campaign T3G - S | 2019-04-22. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Hyundai Motor America is conducting a Service Campaign to update the display audio software on certain 2019 Veloster vehicles. Service Campaign T3Q provides a procedure to update the display audio software for blank home screen. |
| 19-FL-001H | 2019-03-18. Service bulletin. FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS; FUEL SYSTEM, GASOLINE. In a gasoline direct injection (GDI) engine, highly pressurized gasoline is injected via a common rail fuel line and injectors that deliver fuel directly into the combustion chamber of each cylinder. In comparison, in a conventional multi-point fuel injection (MPI) engine, relatively low pressure gasoline is injected into the intake port of each cylinder. Due to high fuel pressures in a GDI system, servicing the GDI system requires special attention and handling procedures. This bulletin provides special service information and specification for the GDI fuel system components. |
| T3G Dealer Best | 2019-03-18. Service bulletin. ENGINE. Applicable vehicles with 2.0L Turbo and 2.4L engines may experience the Check Engine warning lamp illuminated with DTC P1326. Follow the procedure on TSB #19-01-006H (supersedes TSB# 18-01-032-2) to inspect the vehicle and install a wire harness extension or replacement engine based on the inspection results. |
| 19-01-005H | 2019-03-18. Service bulletin. ENGINE. The warranty coverage for the engine long block has been extended to 10 years or 120,000 miles from the date of original retail delivery or date of first use, whichever occurs first, and is valid for original and subsequent owners. |
| 19-01-006H | 2019-03-18. Service bulletin. ENGINE. Applicable vehicles with 2.0L Turbo and 2.4L GDI engines may experience the Check Engine warning lamp illuminated with DTC P1326. Follow the procedure to inspect the vehicle and install a wire harness extension or replacement engine based on the inspection results. |
| 953 Dealer Best | 2019-03-18. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE. Hyundai has developed a new engine monitoring technology called a Knock Sensor Detection System (KSDS). The technology uses software innovations and leverages existing engine sensors to continuously monitor for symptoms that may precede an engine failure. Watch this video to learn more. The KSDS software continuously monitors engine vibrations for unusual patterns that develop as an engine connecting rod bearing wears abnormally that could later cause engine seizure. If vibrations caused by bearing wear start to occur, the malfunction indicator lamp will blink continuously, an audible chime will sound and the vehicle will be placed in a temporary engine protection mode with reduced power and acceleration. At that time, Diagnostic Trouble Code (DTC) P132600 will be recorded in the ECM. In addition, Hyundai will extend the warranty to 10 years and 120,000 miles (up from 100,000 miles) for original and subsequent owners of the covered vehicles for engine repairs needed because of excessive connecting rod bearing damage. |
| 19-SS-002H | 2019-03-18. Service bulletin. SUSPENSION:FRONT:SPRINGS:COIL SPRINGS. The warranty coverage for the front coil springs has been extended to 10 years from the date of original retail delivery or date of first use or 120,000 miles, whichever occurs first. |
| 19-01-002H-1 | 2019-03-18. Service bulletin. ENGINE. Hyundai is conducting a product improvement campaign to enhance the knock sensor software to detect abnormal engine bearing noise before potentially severe engine damage occurs. If abnormal engine bearing noise is detected, the Malfunction Indicator Lamp (MIL) will blink continuously, a chime will sound on certain vehicles, and the vehicle will be placed in Engine Protection Mode allowing the customer to drive to the nearest Hyundai dealer for diagnosis and repair. In addition, DTC P132600 will be recorded in the ECM. The vehicle can continue to be operated for a limited time in Engine Protection Mode, but it will accelerate slower and have a reduced maximum speed. Engine RPMs will be limited to approximately 1800-2000 RPM. |
| 5NP-M7Z5K-02 | 2019-02-19. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information on how to return a Hyundai HEV/PHEV/EV/Fuel Cell Lithium Battery for proper disposal and safe environmental recycling using Hyundai?s authorized vendor Kinsbursky Brothers Inc. (KBI). |
| 5NP-H9R6R-02 | 2019-02-19. Service bulletin. EQUIPMENT. The software update installs a newly developed Knock Sensor Detection System (KSDS) that detects vibrations indicating the onset of excessive connecting rod bearing wear in the engine. The KSDS is designed to alert a vehicle driver at an early stage of bearing wear before the occurrence of engine damage. If vibrations caused by bearing wear start to occur, the Malfunction Indicator Lamp (MIL) will blink continuously, an audible chime will sound, and the vehicle will be placed in Limp Home Mode. At that time, Diagnostic Trouble Code (DTC) P132600, specific to the KSDS, will be recorded in the ECM. The vehicle can continue to be operated for a limited time in Limp Home Mode, but it will accelerate slowly and have a reduced maximum speed with RPMs limited to approximately 1800-2000 RPM. The update will be done free of charge to customers and will only involve the addition of the KSDS software update. |
| 5NP-W4W6L-01 | 2019-02-19. Service bulletin. ELECTRICAL SYSTEM. Hyundai is conducting a product improvement campaign to enhance the knock sensor software to detect abnormal engine bearing noise before potentially severe engine damage occurs. If abnormal engine bearing noise is detected, the Malfunction Indicator Lamp (MIL) will blink continuously, a chime will sound on certain vehicles, and the vehicle will be placed in Limp Home Mode allowing the customer to drive to the nearest Hyundai dealer for diagnosis and repair. In addition, DTC P132600 will be recorded in the ECM. The vehicle can continue to be operated for a limited time in Limp Home Mode, but it will accelerate slower and have a reduced maximum speed. Engine RPMs will be limited to approximately 1800-2000 RPM. |
| 5NP-L6Z7X-01 | 2019-02-19. Service bulletin. ELECTRICAL SYSTEM. Hyundai has launched a Product Improvement Campaign to perform a knock sensor software update on the subject vehicles. This campaign is being implemented to ensure the satisfaction of Hyundai customers. The software update installs a newly developed Knock Sensor Detection System (KSDS) that detects vibrations indicating the onset of excessive connecting rod bearing wear in the engine. The KSDS is designed to alert a vehicle driver at an early stage of bearing wear before the occurrence of engine damage. If vibrations caused by bearing wear start to occur, the Malfunction Indicator Lamp (MIL) will blink continuously, an audible chime will sound, and the vehicle will be placed in Limp Home Mode. At that time, Diagnostic Trouble Code (DTC) P132600, specific to the KSDS, will be recorded in the ECM. The vehicle can continue to be operated for a limited time in Limp Home Mode, but it will accelerate slowly and have a reduced maximum speed with RPMs limited to approximately 1800-2000 RPM. |
| 5NP-E8E9D-02 | 2019-02-19. Service bulletin. ENGINE AND ENGINE COOLING. Hyundai is conducting a product improvement campaign to enhance the knock sensor software to detect abnormal engine bearing noise before potentially severe engine damage occurs. If abnormal engine bearing noise is detected, the Malfunction Indicator Lamp (MIL) will blink continuously, a chime will sound on certain vehicles, and the vehicle will be placed in Limp Home Mode allowing the customer to drive to the nearest Hyundai dealer for diagnosis and repair. In addition, DTC P132600 will be recorded in the ECM. The vehicle can continue to be operated for a limited time in Limp Home Mode, but it will accelerate slower and have a reduced maximum speed. Engine RPMs will be limited to approximately 1800-2000 RPM. |
| 5NP-S6S9Z-12 | 2018-12-17. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This bulletin provides information related to a BMS (Battery Management System) ECU software update that must be performed after replacing a high voltage Lithium Battery in a Sonata HEV (YF HEV) or Tucson Fuel Cell Electric Vehicle (LM FCEV). |
| 5NP-B9V8T-09 | 2018-09-17. Service bulletin. STEERING. On some Sonata (YF, LF), Sonata Hybrid (YF HEV, LF HEV), Santa Fe (NC), and Azera (HG) vehicles, a yoke noise may develop in the steering rack. This bulletin provides information on how to diagnose the yoke noise and replace the rack support yoke assembly. |
| 5NP-X5D2X-07 | 2018-07-16. Service bulletin. SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES. The warranty coverage for the brake pedal stopper has been extended to 15 years with unlimited mileage from the date of original retail delivery or date of first use, whichever occurs first. |
| 5NP-P5L7D-05 | 2018-05-21. 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-F6W6P-05 | 2018-05-21. Service bulletin. POWER TRAIN; POWER TRAIN:MANUAL TRANSMISSION:INTERNAL:GEARS; EQUIPMENT. The shift lever on some 6-speed vehicles may intermittently not shift out of Park. This bulletin provides the diagnostic procedures to correct this condition. |
| 5NP-Z6F3A-11 | 2017-11-14. 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-A5H5K-11 | 2017-11-14. Service bulletin. ELECTRICAL SYSTEM. If you are servicing a Sonata Hybrid with any of the warning messages or comments listed below, follow the Service Procedure to diagnose the condition. ? Hybrid Warning Message was illuminated ? Dash displayed a message: ?Check Hybrid System, Turn off engine? ? Diagnostic Trouble Code P0705 ? Transmission range sensor circuit |
| 5NP-J7X2Y-12 | 2017-10-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Hyundai Motor America is conducting a Service Campaign to perform an underbody corrosion preventative service on certain 2011 ? 2014 MY Sonata previously or currently registered in Salt Belt States. Service Campaign 946 provides a procedure to perform the preventative measure. |
| 5NP-H2D6P-12 | 2017-10-15. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. Some Sonata (YF) vehicles may develop a condition with the separator plate in the middle of the heater box (Heater & Evaporator Assembly) becoming warped and may cause interference against one or more of the internal flaps that control air flow to the vents. |
| 5NP-Z6H6Q-10 | 2017-10-12. Service bulletin. ENGINE AND ENGINE COOLING. Some Sonata Hybrid (YF HEV) vehicles may experience a small oil leak from the electric oil pump (EOP) seals. If so, follow the Service Procedure in this bulletin to inspect and repair the oil seals between the transmission and EOP. No drivability issues are associated with this condition. |
| 5NPH9L4R02 | 2017-09-22. Service bulletin. FUEL/PROPULSION SYSTEM; ENGINE. Hyundai has launched a service campaign to inspect and if needed, repair the evaporative emissions canister and bracket on certain model year 2011? 2015 Hyundai Sonata Hybrid and 2012 ? 2016 Veloster vehicles. This campaign affects such vehicles registered in and operated in Alaska, Connecticut, Delaware, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, Nebraska, New Hampshire, New Jersey, New York, North Dakota, Ohio, Pennsylvania, Rhode Island, South Dakota, Utah, Vermont, West Virginia, and Wisconsin, and the District of Columbia. Reason for this Service Campaign During winter months, large quantities of salt are used to de-ice roads in the states noted above. Road salt and water can corrode the bracket holding the canister in place; as well as the seal within the canister. This can result in the need to replace these components and if necessary, the canister itself. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.