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Service bulletins for the 2019 Hyundai Veloster

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.

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

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Only bulletins with component: Software are shown. Show all

Bulletins, newest first
22-01-043H2022-06-10. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; ENGINE AND ENGINE COOLING. Hyundai is conducting a service campaign to enhance the knock sensor logic with the Cylinder Noise Diagnostic System (CNDS) software update. CNDS is to detect abnormal cylinder wall scuffing or noise of the engine block before potentially severe engine damage occurs. If abnormal noise is detected, the Malfunction Indicator Lamp (MIL) will blink continuously. In addition, DTC P1327 will be recorded in the ECM.
20-01-024H-22021-01-09. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE 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 replace the engine or update the engine ECU software based on the inspection results. Consult the Hyundai Warranty Policy & Procedures and the below chart to determine New or Reman engine usage.
20-01-004H-22020-12-08. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; ENGINE AND ENGINE 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 replace the engine or update the engine ECU software based on the inspection results.
20-FL-006H-12020-08-07. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. This bulletin provides information related to the Engine Control Module (ECM) software logic update for DTC P0300-P0304 Misfire. This update addresses the intermittent misfire that may only occur at cold engine warmup.
20-FL-006H2020-07-08. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE. This bulletin provides information related to the Engine Control Module (ECM) software logic update for DTC P0300-P0304 Misfire. This update addresses an incident of intermittent misfire that may only occur at cold engine warmup.
20-01-004H-12020-07-08. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; 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 replace the engine or update the engine ECU software based on the inspection results.
20-01-024H2020-07-08. Service bulletin. ENGINE; ELECTRICAL SYSTEM:SOFTWARE. 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 replace the engine or update the engine ECU software based on the inspection results. Consult the Hyundai Warranty Policy & Procedures and the below chart to determine New or Reman engine usage.
20-01-004H - The2020-03-07. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING; EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE. 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 replace the engine or update the engine ECU software based on the inspection results.
20-01-006H2020-03-07. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT ADAPTIVE/MOBILITY; 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 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.
Campaign 953 Dea2020-03-07. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE. 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) P1326 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.
Campaign T3T Dea2019-12-16. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE. Hyundai has launched a Service Campaign to update the ECM (Engine Control Module) software for DTC P0128: Coolant Thermostat (Coolant Temp below Thermostat Regulating Temperature) logic improvement.
Campaign T4F Dea2019-11-18. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Hyundai is conducting a Service Campaign to perform an ECM software update to revise the battery sensor data to optimize SOC (State of Charge) value. The ECM Update also includes an update for misfire due to learning cylinder imbalance.
19-01-002H-42019-11-18. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; 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.
Campaign 953 Dea2019-11-18. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:SOFTWARE; ENGINE; EQUIPMENT. 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.
Dealer Best Prac2019-05-20. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. Hyundai has launched a Service Campaign to update the ECM (Engine Control Module) software for DTC P0128: Coolant Thermostat (Coolant Temp below Thermostat Regulating Temperature) logic improvement.
DCS T3T2019-05-20. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Hyundai Motor America is conducting a Service Campaign to update the ECM software on certain 2018 Model Year Elantra GT and 2019 Veloster vehicles equipped with 1.6L turbo engines. Service Campaign T3T provides a procedure to update the ECM software.

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