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Home >> Mazda >> 2021 >> CX-5 Sport, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (On-Board Diagnostic - Engine Control (VIN Y) (2 Of 3)) >> DTC P0451-00: Fuel Tank Pressure Sensor: Sensor Characteristic Malfunction >> Details On DTCs

Details On DTCs

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DTC P0451:00 (PCM, VIN Y) DETECTION CONDITION AND POSSIBLE CAUSE

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 : Standard can be verified by displaying PIDs using M-MDS
Malfunction determination period
  • During one drive cycle
Drive cycle
  • 2
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