Service bulletins for the 2018 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.
240 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| DTC P1326 from 9 | 2019-05-20. Service bulletin. ENGINE. Hyundai has launched a Service Campaign for applicable vehicles with 2.0L Turbo and 2.4L engines that may experience the Check Engine warning lamp illuminated with DTC P1326. |
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| 19-HA-001H | 2019-05-20. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE. This bulletin provides additional service diagnostic information and repair procedures related to electric A/C compressors equipped in hybrid electric vehicles, plug-in hybrid electric vehicles, and electric vehicles. |
| 19-FL-003H | 2019-05-20. 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-HC-001H | 2019-05-20. Service bulletin. ELECTRICAL SYSTEM; ENGINE. If you are servicing a Sonata Hybrid with the symptoms and DTC listed below, follow the Service Procedure on Page 2. |
| 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. |
| 19-BE-004H | 2019-04-22. Service bulletin. VISIBILITY:REARVIEW MIRRORS/DEVICES; VISIBILITY. This bulletin provides information on the serviceable parts for the outside mirror assembly. When diagnosing and repairing the outside mirror, do not replace the entire assembly. Refer to page 2 of this TSB for replacement of individual parts. |
| 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-BE-003H | 2019-03-18. Service bulletin. ELECTRICAL SYSTEM. Some vehicles equipped with the wireless charging pad may experience a no charging condition. This bulletin provides information of how to diagnose the no charging condition. |
| 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-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-T3A9N-12 | 2018-12-17. Service bulletin. POWER TRAIN. The vehicles listed below are equipped with an 8-speed front-wheel drive transmission. Do not replace the transmission for any of the solenoid DTC listed below. Instead, follow the Service Procedure on Page 2 and replace the related part. |
| 5NP-X7G2S-09 | 2018-09-17. Service bulletin. VEHICLE SPEED CONTROL. This bulletin provides the procedure to update the TCU for shift shock when decelerating at slow speeds. |
| 5NP-T8W7X-09 | 2018-09-17. Service bulletin. VISIBILITY. On certain Sonata (LF) vehicles, the left/right outside mirror may not actuate up/down and/or left/right. In these instances it is recommended to replace the outside mirror actuator only, not the entire outside mirror assembly. |
| 5NP-T2E9H-09 | 2018-09-17. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Hyundai Motor America is conducting a Service Campaign to update the TCU software on certain 2018 Model Year Sonata 2.4L vehicles. Service Campaign T3B provides a procedure to update the TCU software. |
| 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-G7C2D-06 | 2018-06-11. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This bulletin describes the procedure to determine if the vehicle?s display audio radio unit needs to be replaced as a result of the clock time inaccuracy (i.e. Resets overnight, loses/gains time). |
| 5NP-X7Y7J-06 | 2018-06-11. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT:ELECTRICAL; EQUIPMENT. This bulletin describes the procedure for updating the Display Audio (D-Audio) System Software for the 2018 Model Year Sonata (LFa). This update prevents the LCD Overlay/Display overlapping condition (previous screen images/icons showing on current screen). |
| 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. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.