This bulletin provides the procedure to update the TCU for a rough idle in Drive with Neutral Control enabled
Hyundai technical service bulletin 21-AT-001H for 2018-2019 Hyundai Sonata.
- Bulletin number
- 21-AT-001H
- Component
- Power train
- Summary
- This bulletin provides the procedure to update the TCU for a rough idle in Drive with Neutral Control enabled. The rough idle may occur only at a stop in Drive with the A/C off and the ATF temperature between 158~210°F (70~99°C). This update also reduces vibration when the brake is released during Neutral Control operation and the accelerator pedal is depressed.
Owners of these vehicles have filed 48 complaints in the transmission category.
Vehicles covered
- Hyundai Sonata 2018-2019 20182019
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