P0451: EVAP system pressure sensor range/performance
You can keep driving. Get it checked when convenient.
Can I drive with P0451?
Yes, you can keep driving. Pressure sensor reading does not change as expected during self-testing; driving is safe.
What does P0451 mean?
P0451 stands for Evaporative Emission Control System Pressure Sensor Range/Performance.
Symptoms you may notice
- Steady check engine light with minimal drivability symptoms
- Normal engine power, idle, and acceleration
- Possible faint gasoline vapor smell near gas cap
How much does it cost to fix?
Repair costs for code P0451 depend on the specific underlying root cause, ranging from simple DIY checks to component replacement. The table below lists the most common causes and rough price ranges in USD:
- Defective fuel tank pressure sensor
- Blocked vapor hose or vent filter
- Partial wiring harness grounding
- Gas tank damage or collapsed tank
What to do next
- Inspect the vent filter near the rear bumper for dirt or mud blockage.
- Check live pressure values with the gas cap removed.
- Replace the fuel tank pressure sensor.
Last updated: October 2026
Related codes
General guidance only, not a professional diagnosis. If the check-engine light is flashing, or the car is running rough, overheating or losing power, stop driving and get help.
About this code
Code P0451 triggers when the pressure sensor reading remains stationary or falls outside normal barometric limits during key-off or cold-start EVAP tests. It poses low immediate danger to the engine or fuel system.