P0451 on Kia vehicles
P0451 is named on 8 Kia model years (2016–2021): 14 manufacturer filings and 1 owner report in NHTSA’s files, across Forte, Rio, Soul, K5.
Which Kia model years name P0451
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2018 Kia Soul | Engine | 2 | — |
| 2017 Kia Forte | Engine | 2 | — |
| 2017 Kia Rio | Engine | 2 | — |
| 2017 Kia Soul | Engine | 2 | — |
| 2016 Kia Forte | Engine | 2 | — |
| 2016 Kia Rio | Engine | 2 | — |
| 2016 Kia Soul | Engine | 2 | — |
| 2021 Kia K5 | Fuel/Propulsion System | — | 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 Kia 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.
While waiting for help, I plugged in my FIXD OBD-II reader later looking over diagnostics read code P0451 – EVAP System Pressure Sensor
Kia filings that name P0451
Source: NHTSA manufacturer communicationsBulletins and campaigns Kia filed with NHTSA whose summary names P0451. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- TSBFUE038 Service bulletin2018-04-27 · Engine And Engine Cooling — Exhaust System
- TSB - CANISTER CLOSE VALVE INSPECTION AND AIR DRAIN CASE REPLACEMENT - This bulletin provides the procedure to inspect and if necessary, replace the Air Drain Case on some 2014-18MY Soul (PS), produced from July 21, 2013 through June 1, 2017, some 2012-2017MY Rio (UB), produced from June 21, 2011 through March 31, 2017, some 2014-2017MY Forte (YD) vehicles, produced from February 18, 2013 through
- TSBFUE038_R1 Service bulletin2019-06-11 · Fuel System, Gasoline
- TSB: AIR DRAIN CASE REPLACEMENT - This bulletin has been revised to include additional information. This bulletin provides the procedure to replace the Air Drain Case on some 2014-2018MY Soul (PS), produced from July 21, 2013 through June 1, 2017, some 2012-2017MY Rio (UB), produced from June 21, 2011 through March 31, 2017, some 2014-2017MY Forte (YD), produced from February 18, 2013 through Marc
What P0451 means
Source: SAE J2012 / OBD-IIP0451 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 Kia 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 P0451 a known problem on Kia vehicles?
It is a documented one: NHTSA's files hold 14 manufacturer filings and 1 owner report naming P0451 on 8 Kia model years (2016–2021). 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 Kia models does P0451 appear on most?
2017 Forte (2 documents), 2016 Forte (2 documents), 2017 Rio (2 documents).
Does P0451 on a Kia 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.