OBD-II Code Decoder
Search the licensed P, B, C, and U reference library by code, definition, system, or manufacturer. Reference-only results are not a complete diagnosis.
Review-withheld definitions are excluded; lookup records are not published diagnostic pages.
P0451 — vehicles with official records naming this code
P0451 is named in NHTSA-published manufacturer communications or investigations for 30 vehicle families, including:
- Cadillac XT4 model years 2019-2024 · 15 records
- Buick Envision model years 2020-2024 · 8 records
- Hyundai Sonata model years 2020-2023 · 8 records
- Hyundai Accent model years 2012-2016 · 5 records
- Hyundai Veloster model years 2012-2016 · 5 records
- Mazda Mazda3 model years 2014-2016 · 5 records
- Audi A6 model years 2016-2017 · 4 records
- Audi A7 model years 2016-2017 · 4 records
- Ford Escape model years 2005-2008 · 4 records
- Mercury Mariner model years 2005-2008 · 4 records
A code named in a manufacturer communication means the document refers to it for those vehicles. It is not a diagnosis of any car, and it does not mean the code is common on that vehicle.
Matching definitions: 1 · Unique codes: 1.
| Code | Meaning | System | Scope | Manufacturer | Severity |
|---|---|---|---|---|---|
| P0451 | EVAP System Pressure Sensor/Switch A Circuit Range/Performance | Powertrain | Generic | Not manufacturer-specific | Not classified |
No matching codes
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