TSB ENG231 — Kia Service bulletin
ENG231 is a service bulletin on file with NHTSA for the Kia Rio, 2022 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. TECHNICAL SERVICE BULLETIN: DATA COLLECTION: EXTRACT CALIFORNIA EMISSIONS DATA FROM ECU (DC22) - This bulletin provides information related to extracting "in use performance tracking" emissions data from the Engine Control Unit (ECU) of certain vehicles sold in California. The…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years ENG231 names
Every document filed under ENG231
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 |
|---|---|---|
| TSB_ENG231_R1 | December 6, 2021 | Service bulletin |
| TSB_ENG231 | September 14, 2021 | Service bulletin |
What ENG231 covers
Engine — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB ENG231?
ENG231 is a service bulletin filed with NHTSA by Kia, covering the Kia Rio across the 2022 model years. NHTSA's summary reads: TECHNICAL SERVICE BULLETIN: DATA COLLECTION: EXTRACT CALIFORNIA EMISSIONS DATA FROM ECU (DC22) - This bulletin provides information related to extracting "in use performance tracking" emissions data from the Engine Control Unit (ECU) of certain vehicles sold in California. The…
Which vehicles does ENG231 cover?
NHTSA's file names Kia Rio (2022). 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 ENG231 a recall, and is the repair free?
No. ENG231 is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of ENG231?
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 ENG231, 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 ENG231. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.