Hyundai Sonata 2020 — technical service bulletin
Bulletin Campaign T5A Dea · NHTSA communication 10177134 · issued Jun 22, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020
model years
1
vehicle entries
Official summary
This service campaign information is related to an Electronic Control Module (ECM) software update to revise the logic for DTC P030X: Cylinder â Xâ Misfire Detected and P0456: EVAP System Leakage Detected â Very Small Leak. This Service Campaign T5A will replace Service Campaign T4N.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.