Can drive — fix at your convenience.
This code means the EVAP pressure sensor is sending a voltage signal that's higher than the expected range, so the computer can't accurately read fuel tank vapor pressure. Common causes include a faulty pressure sensor, an intermittent wiring or connector fault, or an open circuit in the sensor's signal line. The usual fix is replacing the sensor or repairing the wiring, and it's typically an affordable, straightforward repair.
$100 – $300
Varies by vehicle and root cause.
Yes, it's generally safe to drive. This is an emissions code that doesn't affect how the car runs or your safety. Still, get it checked within a week or two, since you'll likely fail an emissions test until it's fixed.
Expect roughly $100 to $300. A new pressure sensor or a wiring repair is usually toward the lower end, with diagnostic time included. Hard-to-reach sensors can push the cost up slightly.
No, it's low severity. The EVAP system only manages fuel vapors, so there's no risk to the engine or drivability. The main issues are a check engine light and failing emissions testing.
They're closely related EVAP pressure sensor codes. P0453 means the signal voltage is too low, while P0454 means it's too high. Both usually point to the same sensor or wiring and are diagnosed the same way.