DTC P0453:00 [L5]: Notes
WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DETECTION CONDITION & POSSIBLE CAUSES
| 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 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 is available.
- The DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- Fuel tank pressure sensor connector or terminal malfunction
- PCM connector or terminal malfunction
- Short circuit in fuel tank pressure sensor power circuit and signal circuit each other
- Short to power supply in wiring harness between fuel tank pressure sensor terminal A and PCM terminal 1AH
- Short to power supply in wiring harness between fuel tank pressure sensor terminal C and PCM terminal 1U
- Fuel tank pressure sensor malfunction
- Open circuit in wiring harness between fuel tank pressure sensor terminal A and PCM terminal 1AH
- Open circuit in wiring harness between fuel tank pressure sensor terminal B and PCM terminal 1AR
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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