DTC P0453-00: Fuel Tank Pressure Sensor High Input: Notes

DTC P0453:00	Fuel tank pressure sensor high input
DETECTION CONDITION	The PCM monitors the EVAP control system fuel tank pressure sensor input signal to the PCM. The test fails when the signal average jumps above a minimum allowable calibrated parameter. Diagnostic support note This is a continuous monitor (CCM). The check engine light 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 first drive cycle. FREEZE FRAME DATA (Mode 2)/Snapshot data is available. The DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	-
POSSIBLE CAUSE	Fuel tank pressure sensor connector or terminals malfunction PCM connector or terminals malfunction Short to power supply in wiring harness between the following terminals: Fuel tank pressure sensor terminal C-PCM terminal 1AD Fuel tank pressure sensor terminal B-PCM terminal 1AH Fuel tank pressure sensor power supply circuit and signal circuit are shorted to each other Open circuit in wiring harness between the following terminals: Fuel tank pressure sensor terminal B-PCM terminal 1AH Fuel tank pressure sensor terminal A-PCM terminal 1AR Fuel tank pressure sensor malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.