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Hyundai TSB #21-AT-001H
2019 Hyundai Sonata
TSB Document:
Affected 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.
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