P2181 on Hyundai vehicles
P2181 is named on 12 Hyundai model years (2019–2023): 11 manufacturer filings and 3 owner reports in NHTSA’s files, across Santa Fe, Sonata, Elantra, Kona, Santa Cruz and 1 more.
Which Hyundai model years name P2181
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2023 Hyundai Santa Fe | Engine | 1 | 1 |
| 2020 Hyundai Sonata | Engine | 1 | 1 |
| 2023 Hyundai Santa Cruz | Engine | 1 | — |
| 2023 Hyundai Tucson | Engine | 1 | — |
| 2022 Hyundai Kona | Unspecified | — | 1 |
| 2022 Hyundai Santa Cruz | Engine | 1 | — |
| 2022 Hyundai Santa Fe | Engine | 1 | — |
| 2022 Hyundai Sonata | Engine | 1 | — |
| 2022 Hyundai Tucson | Engine | 1 | — |
| 2021 Hyundai Santa Fe | Engine | 1 | — |
| 2021 Hyundai Sonata | Engine | 1 | — |
| 2019 Hyundai Elantra | Equipment | 1 | — |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
What Hyundai owners said
Source: NHTSA complaint databaseOwners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.
Multiple auto mechanics have indicated online that this is a very common problem with many Hyundai vehicles from 2020-2023 and can be a danger due to temperature control not being accurate for vehicles (Code P2181)
Hyundai Corporate is refusing to ground or provide alternative transportation for a documented, warranty-covered engine cooling fault (Code P2181), creating a highway stalling risk
At Carmax in Hillside I'll about 3 weeks after I bought this used 2022 Kona the engine check light came on with code p2181
Hyundai filings that name P2181
Source: NHTSA manufacturer communicationsBulletins and campaigns Hyundai filed with NHTSA whose summary names P2181. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 24-EM-001H Service bulletin2024-07-23 · Engine
- Certain 20-22MY Sonata (DN8a), 21-23MY Santa Fe (TMa), and 22-23MY Tucson (NX4a) vehicles may experience a warning lamp illumination for a diagnostic trouble code P2181 that is related to the Integrated Thermal Management Module (ITM). Follow the service procedure outlined in this bulletin to replace the ITM.
- 20-EM-002H Service bulletin2020-07-16 · Equipment
- This bulletin provides a procedure for replacing the thermostat on certain 2019 Elantra vehicles. The thermostat may not function properly and may result in Diagnostic Trouble Codes P0128 or P2181. To correct this condition, follow the procedure outlined in this bulletin to replace the thermostat and air bleed the cooling system after refilling. No drivability issues are associated with this cond
- 23-EM-006H Service bulletin2023-10-30 · Engine And Engine Cooling
- Certain 2022-2023MY Santa Cruz (NXT) vehicles may experience a warning lamp illumination for a diagnostic trouble code P2181 that is related to the Integrated Thermal Management Module (ITM). Follow the service procedure outlined in this bulletin to replace the ITM with a revised part and reprogram the powertrain control module to update the control logic.
What P2181 means
Source: SAE J2012 / OBD-IIP2181 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
A stored code names the test that failed, never the part that caused it. The record above is what Hyundai and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs P2181 a known problem on Hyundai vehicles?
It is a documented one: NHTSA's files hold 11 manufacturer filings and 3 owner reports naming P2181 on 12 Hyundai model years (2019–2023). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Hyundai models does P2181 appear on most?
2023 Santa Fe (2 documents), 2020 Sonata (2 documents), 2019 Elantra (1 document).
Does P2181 on a Hyundai mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.