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.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P0451:00Fuel tank pressure sensor: sensor characteristic malfunctionP0451Fuel tank pressure sensorL sensor characteristic malfunctionManufacturer communications
2Original wording in English
MAZDA
Reported code forms P0451
MIL ON WITH DTC PO451 AND/OR PO12A Some customer s may complain about a MIL ON with DTC P0451 (Fuel tank pressure sensorL sensor characteristic malfunction) and/or P013A (HO2S: Slow response (during transition from rich…
MAZDA
Reported code forms P0451:00
When the engine is started for the first time after parking overnight in cold weather (below freezing), some vehicles may exhibit the check engine light on with DTC P0451:00 (Fuel tank pressure sensor: sensor…
Check vehicle applicability
1A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Mazda | MAZDA3 | 2016 |
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.
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.