DTC P1455 - Fuel Tank Level, Open Or Short Circuit: Condition

WARNING: This page is about a different car, the 1997 Mazda Millenia. However, it is still accessible from the selected car via links, so may be relevant.

DTC is set if fuel gauge sender unit operation range is minimal when fuel consumption is over 8 gallons. Possible causes are:

Fuel gage sending unit malfunction.
Open or short circuit between fuel gauge sending unit and terminal No. 3K on Engine Control Module (ECM) connector.