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Home >> Hyundai >> 2014 >> Equus Signature >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 3) >> DTC P0191: Fuel Rail Pressure Sensor Circuit Range/Performance >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Rationality check
  1. Poor connection
  2. FPS
Case1 Enable Conditions
  • 120rpm < Engine speed < 4520rpm
  • Sensor output voltage< 4.85V
Threshold Value
  • Sensor output voltage difference (Max-Min)< 0.0196
Diagnostic Time
  • 2sec
Case2 Enable Conditions
  • Time after start < 5sec
Threshold Value 1
  • Target Rail Pressure - Real Rail pressure < -1.8MPa or > 1.8 MPa
Threshold Value 2
  • Sensor voltage is out of normal range.
Diagnostic Time
  • 5sec
MIL ON Condition
  • 2 Drive Cycle