DTC P0452:00: Notes

DTC P0452:00	Fuel tank pressure sensor low 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 drops below 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 Short to ground in wiring harness between fuel tank pressure sensor terminal B and PCM terminal 1AH PCM connector or terminals malfunction Fuel tank pressure sensor signal circuit and ground circuit are shorted to each other Fuel tank pressure sensor malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.