P0450: EVAP system pressure sensor malfunction
You can keep driving. Get it checked when convenient.
Can I drive with P0450?
Yes, you can keep driving. The fuel tank pressure sensor has a signal fault; vehicle runs normally.
What does P0450 mean?
P0450 stands for Evaporative Emission Control System Pressure Sensor Malfunction.
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 P0450 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:
- Faulty Fuel Tank Pressure (FTP) sensor
- Damaged wiring harness on top of the fuel tank
- Corroded connector pins
- Bad sensor ground connection
What to do next
- Check live FTP sensor readings on an OBD2 scanner (should be near atmospheric at rest).
- Inspect wiring harness along the top of the fuel tank.
- Replace the FTP sensor if readings are erratic.
Last updated: October 2026
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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 P0450 means the computer cannot read tank pressure accurately. The sensor acts like a barometer inside the fuel tank to measure slight changes in pressure during evaporative system self-tests. The vehicle is usually safe to drive for a short time, but get it checked to drive.