# Service bulletin 26\-AT\-003H TSB

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.

- Type: Service bulletin
- NHTSA id: 11033698
- Published by NHTSA: 2026\-06\-06
- Manufacturer's number: 26\-AT\-003H TSB
- Manufacturer's date: 2026\-05\-19
- NHTSA component: POWER TRAIN

## NHTSA's summary

Some Santa Fe \(MX5A\) and Santa Cruz \(NXT\) vehicles may exhibit a low idle or excessive vibration while in Drive or Reverse, or DTC P050600 \(Idle Air Control System – RPM Lower than Expected\) caused by the one\-way clutch sprags being misaligned. This bulletin provides instructions to remove the automatic transmission and replace the torque converter.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033698-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033698-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Transmission and driveline

## Trouble codes named

P0506

## Vehicles listed

- 2026 HYUNDAI SANTA CRUZ
- 2026 HYUNDAI SANTA FE

## Other bulletins for the same vehicles and component

- [26\-AT\-005H TSB](/bulletins/11033840.md), 2026-06-16, Service bulletin: POWER TRAIN. This bulletin provides information related to a Transmission Control Unit \(TCU\) software update for some vehicles equipped with an 8\-speed wet dual clutch transmission \(8WDCT\). The software update revises the touch point learning variation, improving drivability and judder symptoms. Some 8WDCTs \(indicated by a new part number\) received an updated clutch spring. The correct TCU software update must be matched with the correct corresponding 8WDCT hardware, otherwise, drivability concerns may occur. This service procedure should be performed prior to any 8WDCT replacements done for drivability/judder concerns.

JSON: [/v1/bulletins/11033698](/v1/bulletins/11033698)

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