DTC P0454-00: Fuel Tank Pressure Sensor Intermittent Malfunction: Outline

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0454:00 (PCM, SKYACTIV-G) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Fuel tank pressure sensor intermittent malfunction
Detection condition	Any one of the following conditions is met: The difference between the currently detected fuel tank pressure sensor input voltage and the previously detected input voltage is large. The input voltage of the fuel tank pressure sensor remains low or high.
Fail-safe	Not applicable
Possible cause	Wiring harness malfunction between PCM and fuel tank pressure sensor Fuel tank pressure sensor malfunction Intermittent open or short circuit in the fuel tank pressure sensor or fuel tank pressure sensor signal PCM malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable