P0451 on Hyundai vehicles
P0451 is named on 6 Hyundai model years (2016–2023): 22 manufacturer filings and 0 owner reports in NHTSA’s files, across Sonata, Accent, Veloster.
Which Hyundai model years name P0451
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2023 Hyundai Sonata | Fuel/Propulsion System | 5 | — |
| 2022 Hyundai Sonata | Fuel/Propulsion System | 5 | — |
| 2021 Hyundai Sonata | Fuel/Propulsion System | 5 | — |
| 2020 Hyundai Sonata | Fuel/Propulsion System | 5 | — |
| 2016 Hyundai Accent | Engine | 1 | — |
| 2016 Hyundai Veloster | Engine | 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.
Hyundai filings that name P0451
Source: NHTSA manufacturer communicationsBulletins and campaigns Hyundai 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.
- 24-01-020H TSB Service campaign2024-11-14 · Fuel/Propulsion System
- Certain 2021-2023MY Sonata (DN8) and 2020-2022MY Sonata (DN8A) vehicles may have DTC P0451 stored in the ECU. Follow this bulletin to inspect the check valve, fuel pump cover and fuel tank, and update the ECU. If necessary, replace the check valve and/or fuel tank based on inspection results.
- 24-01-020H DBP Service campaign2024-11-14 · Fuel/Propulsion System
- 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 Federal and California standards.
- 9B1 OL Service campaign2024-12-10 · Electrical System
- The subject vehicles may have Diagnostic Trouble Code (DTC) P0451 stored in the ECU, which could cause the Check Engine Lamp to come on.
- 5NP-R8G4T-07 Service bulletin2018-06-07 · Engine And Engine Cooling — Exhaust System
- Certain 2012-2016 1.6L VELOSTER (FS) vehicles may experience a check engine warning light with the following DTC(s) found stored in the Engine Control Module (ECM): ? DTC P0455 - Evaporative emission system-Leak detected (Large leak) ? DTC P0456 - Evaporative System (EVAP) - Very Small Leak ? DTC P0449 - Canister Closed Valve (CCV) - Restricted Vent Circuit ? DTC P0451 - Fuel Tank PSI Sensor (
- 5NP-Q7J2C-07 Service bulletin2018-06-21 · Engine And Engine Cooling — Exhaust System
- Certain 2012-2016 1.6L VELOSTER (FS) vehicles may experience a check engine warning light with the following DTC(s) found stored in the Engine Control Module (ECM): ? DTC P0455 - Evaporative emission system-Leak detected (Large leak) ? DTC P0456 - Evaporative System (EVAP) - Very Small Leak ? DTC P0449 - Canister Closed Valve (CCV) - Restricted Vent Circuit ? DTC P0451 - Fuel Tank PSI Sensor (
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 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 P0451 a known problem on Hyundai vehicles?
It is a documented one: NHTSA's files hold 22 manufacturer filings and 0 owner reports naming P0451 on 6 Hyundai model years (2016–2023). 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 P0451 appear on most?
2023 Sonata (5 documents), 2022 Sonata (5 documents), 2021 Sonata (5 documents).
Does P0451 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.