Service bulletins for the 2021 Hyundai Elantra
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.
96 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Automatic transmission are shown. Show all
| 22-01-041H | 2022-12-07. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:CLUTCHES/BANDS:ACTUATORS/SOLENOIDS; POWER TRAIN; ELECTRICAL SYSTEM:PROPULSION SYSTEM:HYBRID MANAGEMENT:POWER CONTROL UNIT/MODULE (HPCU). A compliance software update is needed for DTC P17D249, a permanent DTC that affects the MCA (Modular Clutch Actuator). The software update allows the MCA to send the appropriate diagnostics status to the HPCU (Hybrid Power Control Unit) so the DTC can be cleared when the CARB drive cycle has been met. Certain vehicles may experience a check engine light. |
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| 22-01-041H | 2022-12-07. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:CLUTCHES/BANDS:ACTUATORS/SOLENOIDS; ELECTRICAL SYSTEM:PROPULSION SYSTEM:HYBRID MANAGEMENT:POWER CONTROL UNIT/MODULE (HPCU); ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN. This bulletin provides information related to a Modular Clutch Actuator (MCA) compliance software update for P17D249, a permanent DTC that cannot be cleared with the CARB drive cycle. The software update allows the MCA to send the appropriate diagnostics status to the Hybrid Power Control Unit (HPCU) so the DTC can be cleared when the CARB drive cycle has been met. Certain vehicles may experience a check engine light. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.