TSB Document:

Affected Component: ELECTRICAL SYSTEM

Summary
Certain 20MY Elantra (AD/ADa) vehicles may experience an illuminated check engine warning light due to Diagnostic Trouble Codes (DTC) listed below. Perform the Transmission Control Unit (TCU) update, and, if necessary, replace the IVT (Intelligent Variable Transmission) to resolve this condition.

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Date Published
DEC 15, 2020
NHTSA TSB #
10185430
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