DTC P0454:00 [MZI-3.7]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSE

DTC P0454:00	Fuel tank pressure sensor intermittent
DETECTION CONDITION	The fuel tank pressure changes more than 14 inches of water in 0.10 s.
POSSIBLE CAUSE	Intermittent open or short in the fuel tank pressure sensor or the fuel tank pressure sensor signal Fuel tank pressure sensor malfunction