2018 Hyundai Sonata Technical Service Bulletins

208 technical service bulletins (TSBs) are on record for the 2018 Hyundai Sonata. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10167769Oct 28, 2019Engine, Equipment. 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.
• 10167768Oct 28, 2019Electrical system, Equipment. 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 and/or replacement engine based on the inspection results.
• 10167767Oct 28, 2019Engine, 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 Engine Protection Mode allowing the customer to drive to…
• 10167765Oct 28, 2019Engine, Equipment, Electrical system. 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.
• 10167764Oct 28, 2019Engine, Equipment, Electrical system. Hyundai has launched a Service Campaign for applicable vehicles with 2.0L Turbo and 2.4L GDI engines that may experience the Check Engine warning lamp illuminated with DTC P132600.
• 10167269Oct 28, 2019Engine cooling. 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.
• 10167268Oct 28, 2019Engine cooling. 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 and/or replacement engine based on the inspection results.
• 10167267Oct 28, 2019Engine 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 Engine Protection Mode allowing the customer to drive to…
• 10167260Oct 28, 2019Engine cooling. 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.
• 10167258Oct 28, 2019Engine cooling. Hyundai has launched a Service Campaign for applicable vehicles with 2.0L Turbo and 2.4L GDI engines that may experience the Check Engine warning lamp illuminated with DTC P132600.
• 10167253Oct 14, 2019Equipment. This bulletin provides instruction detailing the proper methodology for scanning and uploading captured GDS data files to the Techline Repository. Compliance with this bulletin ensures that the GDS data files are correctly transferred and matched with a Techline Case number.
• 10165466Aug 19, 2019Electrical system, Equipment, 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 oil pressure harness with integrated oil temperature sensor.
• 10165463Aug 15, 2019Equipment, Transmission and drivetrain. 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 input/output speed sensor and oil pressure harness.
• 10165462Aug 15, 2019Engine cooling, Electrical system. 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.
• 10165455Aug 12, 2019Transmission and drivetrain, Engine, Equipment. 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
• 10163287Jun 18, 2019Electrical system, Engine. On certain 2018 MY Sonata (LF) equipped with the 2.4L or 2.0L Turbo engine, the starter M-Terminal nut may become relaxed and loosened. If this condition exists, the vehicle may experience a no crank condition in colder ambient temperatures. In most cases the starter will function normally at room temperature. This bulletin provides the service procedure to properly tighten the starter M-Terminal nut.
• 10163279Jun 4, 2019Transmission and drivetrain. This TSB provides a procedure to diagnose and repair a transaxle for the following Incorrect Ratio DTC (transaxle clutch slipping more than 200 rpm in gear).
• 10161751May 16, 2019Lane departure, Forward collision avoidance. This bulletin provides information for troubleshooting of the Blind-Spot Collision Warning (BCW/BSD) system whenever it exhibits Diagnostic Trouble Code (DTC) C120B/D or C160A.
• 10160107Apr 22, 2019Equipment, 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.
• 10160106Apr 22, 2019Steering. This bulletin provides information regarding replacement of the column-mounted Motor Driven Power Steering (MDPS) system as separate components.
• 10160105Apr 22, 2019Engine, Equipment. Hyundai has refined the engine inspection for vehicles that experienced the Check Engine light with DTC P132600 to eliminate the interference caused by the wiring harness. As a result, we need the vehicles currently waiting for an engine replacement to be re-tested with the new software update using the GDS-mobile.
• 10160104Apr 22, 2019Engine. 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.
• 10160098Apr 15, 2019Electrical system, Transmission and drivetrain. 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.
• 10158804Mar 15, 2019Electrical system, Equipment. Hyundai has launched a Product Improvement Campaign to perform a knock sensor software update on applicable vehicles.
• 10158803Mar 13, 2019Visibility (wipers, defrost, mirrors). 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.
• 10158801Mar 13, 2019Equipment. 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.
• 10154683Feb 18, 2019Fuel system. 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…
• 10154682Feb 15, 2019Engine. 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.
• 10154681Feb 15, 2019Engine. 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.
• 10154680Feb 15, 2019Engine. 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.
• 10154679Feb 15, 2019Electrical system, 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…
• 10154676Feb 12, 2019Electrical 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.
• 10154674Feb 7, 2019Engine. 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…
• 10152889Jan 17, 2019Equipment. 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…
• 10152825Jan 10, 2019Engine 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…
• 10151894Nov 2, 2018Transmission and drivetrain. 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.
• 10144430Aug 30, 2018Steering. 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.
• 10144433Aug 20, 2018Visibility (wipers, defrost, mirrors). 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.
• 10144434Aug 9, 2018Vehicle speed control. This bulletin provides the procedure to update the TCU for shift shock when decelerating at slow speeds.
• 10144432Aug 9, 2018Electrical system. 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.
• 10140445May 22, 2018Equipment. 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).
• 10140442May 7, 2018Equipment. 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).
• 10138235Apr 30, 2018Transmission and drivetrain, 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.
• 10138240Apr 6, 2018Transmission and drivetrain, 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.
• 10138239Apr 2, 2018Equipment, Transmission and drivetrain. 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.
• 10133166Mar 29, 2018Equipment. Hyundai Motor America is conducting a Service Campaign to update the display audio software on certain dealer stock 2018 Sonata. Service Campaign T2W provides a procedure to update the display audio software.
• 10133164Mar 29, 2018Electrical system. 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).
• 10129908Feb 7, 2018Exterior lighting. This TSB provides information on the headlight pattern changes on certain 2018 MY Sonata (LFa), Elantra (ADa)(AD), Elantra GT (PD), Santa Fe Sport (AN), and Santa Fe (NC).
• 10128603Jan 3, 2018Equipment, Electrical system. This bulletin describes the procedure to determine if the vehicle?s head unit needs to be replaced as a result of the system frequently losing a Bluetooth connection with Apple iPhone devices.
• 10127009Dec 11, 2017Transmission and drivetrain, Engine cooling. Hyundai Motor America is conducting a Service Campaign to update the ECM and TCM on certain 2018 Year Sonata 2.0L turbo vehicles. Service Campaign T2Q provides a service procedure to update the ECM and TCM.

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