DTC P0453: Fuel Tank Pressure Sensor High Input: Notes

DTC P0453 CHART (MZI-3.7)

DTC P0453	Fuel tank pressure sensor high input
DETECTION CONDITION	The PCM monitors the evaporative emission (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.
POSSIBLE CAUSE	Connector or terminal malfunction Short to the constant voltage supply circuit between fuel tank pressure sensor terminal C and PCM terminal 1I Short to power supply between fuel tank pressure sensor terminal A and PCM terminal 1D Open circuit between fuel tank pressure sensor terminal C and PCM terminal 1I Open circuit between fuel tank pressure sensor terminal B and PCM terminal 1AT Fuel tank pressure sensor power circuit and signal circuit are shorted each other Fuel tank pressure sensor malfunction
Courtesy of MAZDA MOTORS CORP.