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DTC P0451: Fuel Tank Pressure Sensor Range/Performance: Notes

DTC P0451 CHART (MZI-3.7)

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