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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 50 (On-Board Diagnostic - Engine Controls (2 Of 4)) >> DTC P0451-00: Fuel Tank Pressure Sensor: Sensor Characteristic Malfunction >> Details On DTCs

Details On DTCs

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.
DESCRIPTION Fuel tank pressure sensor: sensor characteristic malfunction
DETECTION CONDITION  Determination conditions
  • The fuel tank pressure sensor input voltage is the threshold or more.
Preconditions
  • Battery voltage: above 8 V *1
  • Period ignition is switched off before engine starts: 120 min or more 
  • Purge solenoid valve not operating
  • The following DTCs are not detected:
    • Purge solenoid valve: P0443:00
    • Evaporative passage blockage: P1450:00
  • *1 : Value can be verified by displaying PIDs using M-MDS
Malfunction determination period
  • During one drive cycle
Drive cycle
Self test type
  • CMDTC self test
Sensor used
  • Fuel tank pressure sensor
FAIL-SAFE FUNCTION 
  • Not applicable
VEHICLE STATUS WHEN DTCs ARE OUTPUT 
  • Illuminates check engine light.
POSSIBLE CAUSE 
  • Fuel tank pressure sensor connector or terminals malfunction
  • PCM connector or terminals malfunction
  • Fuel tank pressure sensor malfunction
  • Charcoal canister malfunction
  • CV solenoid valve malfunction
  • Evaporative hose malfunction
  • PCM malfunction