TSB 26-01-039H — Hyundai Service campaign
26-01-039H is a service campaign on file with NHTSA for the Hyundai Elantra, 2019–2020 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 Elantra (ADA) vehicles may have been incorrectly updated with Cylinder Noise Detection System (CNDS) software that can set DTC P132700; this software was intended only for Korean-built Elantra (AD) vehicles. In addition, the California Air Resources Board has determined…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Worth checking your VIN against. 26-01-039H 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 26-01-039H names
| Vehicle | Model years |
|---|---|
| Hyundai Elantra | 2019, 2020 |
Every document filed under 26-01-039H
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 |
|---|---|---|
| 26-01-039H TSB | August 6, 2026 | Service campaign |
| 26-01-039H DN | August 6, 2026 | Service campaign |
What 26-01-039H covers
Engine, Electrical — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB 26-01-039H?
26-01-039H is a service campaign filed with NHTSA by Hyundai, covering the Hyundai Elantra across the 2019–2020 model years. NHTSA's summary reads: Certain Elantra (ADA) vehicles may have been incorrectly updated with Cylinder Noise Detection System (CNDS) software that can set DTC P132700; this software was intended only for Korean-built Elantra (AD) vehicles. In addition, the California Air Resources Board has determined…
Which vehicles does 26-01-039H cover?
NHTSA's file names Hyundai Elantra (2019–2020). 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 26-01-039H a recall, and is the repair free?
26-01-039H 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 26-01-039H?
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 26-01-039H, 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 26-01-039H. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.