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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 39 (Engine Control System Diagnosis - 1.6L (2 Of 3) (Except HEV)) >> DTC P0451: Evaporative Emission System-Pressure Sensor Range/Performance >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

WARNING: This page is about a different variant/trim than selected.
Item Detecting Condition Possible Cause
DTC Strategy
  • Rationality check
  1. Hose between Canister and Tank is not connected.
  2. Faulty FTPS
Case 1 Enable Condition
  • Vehicle speed is lower than 19 mph
  • Debouncing time for CCV opening is higher than 25 sec
  • Ambient Temp is higher than 0°C (32°F)
Threshold Value
  • Δ FTP is higher than 2.5kPa
Diagnostic Time
  • 10 sec
Case 2 Enable Condition
  • Time after engine starts has passed 25 second.
  • BARO is greater than 74.5kPa.
  • Ambient Temp is between 0°C (32°F) and 40°C (104°F)
  • Fuel level is between 15% and 85%
  • Debouncing time for CCV opening is higher than 25 sec
Threshold Value
  • FTPS is lower than -4.5 kPa or FTPS is higher than 4.9kPa
Diagnostic Time
  • 14 sec
Case 3 Enable Condition
  • Ambient Temp is higher than 0°C (32°F)
  • Vehicle speed is higher than 0mph
  • Intake manifold press./amb. Press is lower than 0.8
  • Tank pressure is between -4.5kpa and 4.9kpa
  • Fuel level is between 15% and 85%
  • Δ Canister Purge flow is higher than 1.8kg
Threshold Value
  • Δ FTP is lower than 0.03 kPa
Diagnostic Time
  • 15 sec
Case 4 Enable Condition
  • Ambient Temp is between -6.8°C (19.76°F) and 35.3°C (95.54°F)
  • Fuel level is between 15% and 85%
  • Vehicle speed is between 9.3mph and 55mph
  • Intake manifold press./amb. Press is lower than 0.62
  • CPSV and CCV plausibility check result or No error of CPSV & CCV after Leak monitoring
Threshold Value
  • FTPS is lower than -2 kPa or FTPS is higher than 2kPa
Diagnostic Time
  • 5sec
Mil On Condition
  • 2 driving cycle