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Home >> Lexus >> 2008 >> RX 400h AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> SFI System >> DTC P1451 Fuel Tank Pressure Sensor Range/Performance; DTC P1452 Fuel Tank Pressure Sensor Low Input; DTC P1453 Fuel Tank Pressure Sensor High Input >> DTC Summary

DTC Summary

DTC DETECTION CONDITION CHART

DTC No. Monitoring Item DTC Detection Condition Trouble Area Detection Timing Detection Logic
P1451 Pressure sensor abnormal voltage fluctuation Sensor output voltage fluctuates frequently in certain time period.
  • Fuel tank pressure sensor
  • Connector/wire harness (Fuel tank pressure sensor - HV control ECU)
  • HV control ECU
  • EVAP monitoring (ignition switch off)
  • Engine running
2 trips
P1451 Pressure sensor constant voltage Sensor output voltage does not vary in certain time period.
  • Fuel tank pressure sensor
  • Connector/wire harness (Fuel tank pressure sensor - HV control ECU)
  • HV control ECU
  • EVAP monitoring (ignition switch off)
2 trips
P1452 Pressure sensor voltage low Fuel tank pressure is less than-17.187 kPa (-128.93 mmHg) for 0.5 seconds.
  • Fuel tank pressure sensor
  • Connector/wire harness (Fuel tank pressure sensor - HV control ECU)
  • HV control ECU
  • EVAP monitoring (ignition switch off)
  • Ignition switch on
1 trip
P1453 Pressure sensor voltage high Fuel tank pressure is more than 23.9 kPa (179.30 mmHg) for 0.5 seconds.
  • Fuel tank pressure sensor
  • Connector/wire harness (Fuel tank pressure sensor - HV control ECU)
  • HV control ECU
  • EVAP monitoring (ignition switch off)
  • Ignition switch on
1 trip