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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 125 (Engine Control System Diagnosis (1 Of 2) (HEV)) >> DTC P0451: Evaporative Emission System-Pressure Sensor Range/Performance >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

WARNING: This page is about a different variant/trim than selected.
Item Detecting Condition Possible cause
Case 1 DTC Strategy
  • Signal Stuck in range
  1. Poor connection or damaged harness
  2. Faulty FTPS
  3. Faulty PCSV
  4. Fuel Cap missing
Enable Conditions
  • Vehicle Speed is faster than 31mph at least one time during driving cycle
  • Canister Purge Flow is greater than 0.42 g/sec. (Uninterupted 30 sec.)
  • Fuel level is lower than 85%
  • Ambient Temperature is higher than -8°C (17°F)
  • Canister Load is lower than 0.5
 
Threshold Value
  • Signal Variation is lower than 30 mV (1kPa)
 
Diagnostic Time
  • 30 sec
 
Case 2 DTC Strategy
  • Signal Stuck High
 
Enable Conditions
  • Canister Purge Flow is greater than 0.42 g/sec. (Uninterupted 30 sec.)
  • Fuel level is lower than 85%
  • Ambient Temperature is higher than -8°C (17°F)
  • Engine Coolant Temperature is lower than 50°C (122°F)
  • Canister Load is lower than 0.5
 
Threshold Value
  • Fuel Tank Pressure is greater than 400 Pa
 
Diagnostic Time
  • 30 sec
 
Case 3 DTC Strategy
  • Signal Stuck High
 
Enable Conditions
  • Vehicle Speed is faster than 3mph at least one time during driving cycle
  • Fuel level is lower than 85%
  • Ambient Temperature is higher than -8°C (17°F)
  • Engine Coolant Temperature is lower than 50°C (122°F)
  • Canister Load is lower than 0.5
 
Threshold Value
  • Fuel Tank Pressure is greater than 1500 Pa
 
Diagnostic Time
  • 30 sec
 
Case 4 DTC Strategy
  • Signal Stuck Low
 
Enable Conditions
  • Fuel level is lower than 85%
  • Ambient Temperature is higher than -8°C (17°F)
  • Engine Coolant Temperature is lower than 50°C (122°F)
  • Canister Load is lower than 0.5
 
Threshold Value
  • Fuel Tank Pressure is between -5700Pa and -2000 Pa
 
Diagnostic Time
  • 40 sec
 
Mil On Condition
  • 2 driving cycle