Service bulletin Campaign 953 Dea

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10167765
Published by NHTSA	2019-11-18
Manufacturer's number	Campaign 953 Dea
Manufacturer's date	2019-10-28
NHTSA component	EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:SOFTWARE; ENGINE; EQUIPMENT

NHTSA's summary

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.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Engine, Equipment and accessories, Software

Vehicles listed
HYUNDAI SANTA FE	2019
HYUNDAI SANTA FE SPORT	2013, 2014, 2015, 2016, 2017, 2018
HYUNDAI SONATA	2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
HYUNDAI TUCSON	2014, 2015
HYUNDAI TUCSON	2018, 2019
HYUNDAI VELOSTER	2019

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
21V749000	2021-09-24. ELECTRICAL SYSTEM:SOFTWARE; EXTERIOR LIGHTING:TURN SIGNAL

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
22-01-043H	2022-06-10. Service bulletin. 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.
21-01-023H-4	2022-02-08. Service bulletin. Hyundai is conducting a 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, 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.
DBP972	2022-01-08. Service bulletin. When asked to provide the Modem Information, the Universal Subscriber Identity Module (USIM) may not be available. This TSB# 21-01-080H describes the 3-part software to correct this condition and activate Blue Link Services.
TBB-DCS160118	2021-07-19. Service bulletin. Base audio software update.
20-01-024H-2	2021-01-09. Service bulletin. 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-2	2020-12-08. Service bulletin. 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-1	2020-08-07. Service bulletin. 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-BE-008H	2020-07-08. Service bulletin. This bulletin provides information for new software to update the Navigation and Display Audio system to include the Apple CarPlay and Android Auto feature. This bulletin describes how to transfer the update software to a storage drive (USB or SD Card) and perform the software installation into the audio system.
20-FL-006H	2020-07-08. Service bulletin. 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-1	2020-07-08. Service bulletin. 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.