TSB 24-01-020H — Hyundai Service campaign
24-01-020H is a service campaign on file with NHTSA for the Hyundai Sonata, 2020–2023 model years, filed and re-filed as 2 documents. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. Certain 2021-2023MY Sonata (DN8) and 2020-2022MY Sonata (DN8A) vehicles may have Diagnostic Trouble Code (DTC) P0451 stored in the Electronic Control Unit (ECU). The California Air Resources Board has determined that these vehicles may be releasing air pollutants which exceed…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Worth checking your VIN against. 24-01-020H is filed as a service campaign, which unlike an ordinary bulletin can mean free or reimbursed work when a vehicle qualifies. Ask a dealer using the document ID below, and check open recalls separately at nhtsa.gov/recalls.
Vehicles and model years 24-01-020H names
| Vehicle | Model years |
|---|---|
| Hyundai Sonata | 2020, 2021, 2022, 2023 |
Every document filed under 24-01-020H
Manufacturers re-issue a bulletin as the repair changes, and file separate copies for technicians and for owners. All of them carry the same number.
| Document ID | Filed | Type |
|---|---|---|
| 24-01-020H TSB | November 14, 2024 | Service campaign |
| 24-01-020H DBP | November 14, 2024 | Service campaign |
What 24-01-020H covers
Fuel system — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB 24-01-020H?
24-01-020H is a service campaign filed with NHTSA by Hyundai, covering the Hyundai Sonata across the 2020–2023 model years. NHTSA's summary reads: Certain 2021-2023MY Sonata (DN8) and 2020-2022MY Sonata (DN8A) vehicles may have Diagnostic Trouble Code (DTC) P0451 stored in the Electronic Control Unit (ECU). The California Air Resources Board has determined that these vehicles may be releasing air pollutants which exceed…
Which vehicles does 24-01-020H cover?
NHTSA's file names Hyundai Sonata (2020–2023). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB 24-01-020H a recall, and is the repair free?
24-01-020H is filed as a service campaign, not a recall — but this is the kind of communication that can mean free or reimbursed work if your VIN qualifies. Take the number to a dealer and ask. Recalls are separate and always free; check yours by VIN at nhtsa.gov/recalls.
How do I get the full text of 24-01-020H?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under 24-01-020H, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under 24-01-020H. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.