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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 42 (Engine Control System Diagnosis - 2.0L (2 Of 3) (Except HEV)) >> DTC P0454: Evaporative Emission System-Pressure Sensor Intermittent >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

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Item Detecting Condition Possible cause
DTC Strategy
  • Noisy signal check
  1. Poor connection or damaged harness
  2. Faulty FTPS
Enable Conditions
  • Coolant temperature is higher than 50°C (122°F)
  • Ambient Air Temperature (AAT) is higher than -10°C (14°F)
  • Vehicle speed is slower than 12 km/h (7.5 mph)
  • Fuel level is less than 85%
  • Time after engine starts has passed 100 second.
  • Ambient pressure is greater than 70 kPa (700 hPa)
  • Canister load is less than 0.35
  • Differential fuel tank pressure is between -1100 Pa and 400 Pa
  • Time since last EVAP monitoring test abortion is longer than 60 sec
  • Battery voltage is greater than 10 V
Threshold value
  • Leak detection test inhibited more than 3 times due to noise in tank pressure signal
Diagnosis Time
  • 3 times Leak test inhibited by Noisy signal
MIL On Condition
  • 2 Driving Cycles