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Home >> Hyundai >> 2015 >> Equus Ultimate >> 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
  • 120 RPM < Engine speed < 4520 RPM
  • Sensor output volatage< 4.85V
Threshold Value
  • Sensor output volatage difference (Max-Min) < 0.0196
Diagnostic Time
  • 2 sec
Case2 Enable Conditions
  • Time after start < 5 sec
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
  • 5 sec
MIL On Condition
  • 2 Drive Cycle
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