DTC P0451:00 [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 P0451:00	Fuel tank pressure sensor range/performance problem
DETECTION CONDITION	NOTE: DTC P0451 00 is set for a fuel tank pressure sensor range (offset) concern. The fuel tank pressure sensor output is offset by +/- 424 Pa {43.2 kgf/m ² , 0.0615 psi} or more. Diagnostic support note This is an intermittent 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.
POSSIBLE CAUSE	Fuel tank pressure sensor connector or terminal malfunction PCM connector or terminal malfunction Fuel tank pressure sensor malfunction PCM malfunction

DTC P0451:00

Fuel tank pressure sensor range/performance problem

DETECTION CONDITION

NOTE:

DTC P0451 00 is set for a fuel tank pressure sensor range (offset) concern.

The fuel tank pressure sensor output is offset by +/- 424 Pa {43.2 kgf/m ² , 0.0615 psi} or more.

Diagnostic support note

This is an intermittent 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.

POSSIBLE CAUSE

Fuel tank pressure sensor connector or terminal malfunction
PCM connector or terminal malfunction
Fuel tank pressure sensor malfunction
PCM malfunction