Warranty extension 26-01-053H DCS

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	Warranty extension
NHTSA id	11034851
Published by NHTSA	2026-07-08
Manufacturer's number	26-01-053H DCS
Manufacturer's date	2026-07-03
Campaign id or software version	LA32
NHTSA component	ELECTRICAL SYSTEM

NHTSA's summary

Certain Palisade Hybrid (LX3 HEV) vehicles may illuminate the Malfunction Indicator Lamp (MIL) and display a false “Check Hybrid System” warning message after use of Bluelink Remote Start following extended parking periods. Related DTCs associated with the MIL include U116087, U016487, U100787, U012987, U010087, U100387, U100287, U010187, and U015587. Technical Service Bulletin (TSB) 26-01-053H provides instructions to perform a Data Communication Unit (DCU) software update to prevent these conditions.

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

Trouble codes named

U0100, U0101, U0129, U0155, U0164, U1002, U1003, U1007, U1160

Vehicles listed
HYUNDAI IONIQ 9	2026

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

Recalls for the same vehicles and component
26V068000	2026-02-05. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY

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
26-01-053H-1 TSB	2026-08-15. Warranty extension. Certain IONIQ 9 (ME1A EV) vehicles may exhibit a Data Communication Unit (DCU) software error due to the internal timer initialization logic not being implemented. The DCU module may shut down telematics services after one year. This bulletin provides instructions to perform a software update for the DCU module.
26-01-053H TSB	2026-07-08. Warranty extension. Certain IONIQ 9 (ME1A EV) vehicles may exhibit a Data Communication Unit (DCU) software error due to the internal timer initialization logic not being implemented. The DCU module may shut down telematics services after one year. This bulletin provides instructions to perform a software update for the DCU module.
25-01-035H TSB	2025-06-03. Service campaign. Certain 2026MY IONIQ 9 (ME1A EV) vehicles may have DTC C138201 (Lever Hall Sensor Fault) set in the Electronic Shift Control System which could prevent the vehicle from being shifted out of the “Park” position. This system is also known as Shift-by-Wire Shift Control Unit (SBWSCU). Follow the procedure in this TSB to update the Shift-by-Wire (SBW) software logic.