DTC P0454:00: Notes

DTC P0454:00	Fuel tank pressure sensor intermittent
DETECTION CONDITION	The fuel tank pressure changes more than 356 mm {14.0 in} of water in 0.1 s . Diagnostic support note This is a continuous monitor (CCM). The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle. FREEZE FRAME DATA (Mode 2)/Snapshot data is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	Fuel tank pressure sensor malfunction Intermittent open or short in the fuel tank pressure sensor or the fuel tank pressure sensor signal PCM malfunction