Hyundai Tucson 2019 — technical service bulletin
Bulletin 20-FL-010H · NHTSA communication 10182322 · issued Oct 19, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2019
model years
1
vehicle entries
Official summary
This bulletin provides information related to the repair of DTC P0420 â Catalytic Converter System Bank 1 - Efficiency Below Thresholdâ found stored in the Engine Control Module (ECM). The repair involves performing an ECM Update and replacement of the exhaust manifold catalyst.
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.