DTC P0451:00 [MZI-3.7]: 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 CAUSE

DTC P0451:00	Fuel tank pressure sensor range/performance
DETECTION CONDITION	NOTE: For some vehicle applications, DTC P0451:00 is set for a fuel tank pressure sensor range (offset) concern The DTC P0454 replaces the original P0451:00 for intermittent (noisy) sensor concerns Until the phase in process is complete, noisy or offset fuel tank pressure sensor concerns may set DTC P0451:00 The fuel tank pressure changes more than 14 inches of water in 0 10 s. Fuel tank pressure sensor output is offset by + /-1.7 inches of water
POSSIBLE CAUSE	Intermittent open or short in the fuel tank pressure sensor or the fuel tank pressure sensor signal Connector or terminal malfunction Fuel tank pressure sensor malfunction PCM malfunction

DTC P0451:00

Fuel tank pressure sensor range/performance

DETECTION CONDITION

NOTE:

For some vehicle applications, DTC P0451:00 is set for a fuel tank pressure sensor range (offset) concern The DTC P0454 replaces the original P0451:00 for intermittent (noisy) sensor concerns Until the phase in process is complete, noisy or offset fuel tank pressure sensor concerns may set DTC P0451:00

The fuel tank pressure changes more than 14 inches of water in 0 10 s. Fuel tank pressure sensor output is offset by + /-1.7 inches of water

POSSIBLE CAUSE

Intermittent open or short in the fuel tank pressure sensor or the fuel tank pressure sensor signal
Connector or terminal malfunction
Fuel tank pressure sensor malfunction
PCM malfunction