Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P0451Fuel Tank PSI Sensor (FTPS / DPS) - Range Performance (No FTPS Change) There are no drivability symptoms associated with these DTC(s)
P0451EVAPORATIVE EMISSIONS CONTROL SYSTEM PRESSURE SENSOR RANGE/PERFORMANCE
P0451FUEL TANK PRESSURE SENSOR CIRCUIT RANGE / PERFORMANCE PROBLEM
Manufacturer communications
57Original wording in English
MAZDA
Some vehicles may experience the CHECK ENGINE light ON with one of the following DTCs or a combination of these DTCs. P0451 • P2422 • P2451 • P0441 • This may be caused by a concern with the fuel pressure sensor or shutter valve operation.
FORD
*This article supersedes TSB 24-2199 to add the rear half shaft seals to the TSB parts list. Some of the vehicles listed in the model statement above may exhibit one of the following conditions: *Fuel tank not filling up beyond half-full *Hard to start *Stalls upon restart after refueling *A malfunction indicator lamp (MIL) with…
VOLKSWAGEN
This is a notice for software changes with the ODIS diagnostic program to correct the communication during vehicle programming function: Hotfix - 0001 – EVAP Fault Codes Missing Test Plan - P045100: Evaporative Emission System Pressure Sensor/Switch – No test plan.
FORD
Some of the vehicles listed in the Model statement above may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P0451 stored in the powertrain control module (PCM). This may be due to the software level of the PCM.
Check vehicle applicability
261A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Audi | A6 ↗ | 2018 |
| Audi | A6 ↗ | 2017 |
| Audi | A6 ↗ | 2016 |
| Audi | A7 ↗ | 2018 |
| Audi | A7 ↗ | 2017 |
| Audi | A7 ↗ | 2016 |
| Buick | ENVISION ↗ | 2024 |
| Buick | ENVISION ↗ | 2023 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Evaporative Emission Control System Pressure Sensor Range/Performance
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.