LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Kia >> 2015 >> Soul Base, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) - 1.6L >> DTC P0191: Fuel Rail Pressure Sensor Circuit Range/Performance >> DTC Information >> DTC Detecting Condition
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
Case 1 DTC Strategy
  • High pressure sensor output jitter
  1. Poor connection
  2. FRPS
  3. Abnormal fuel pressure
  4. Low or no fuel
Enable Conditions
  • Sensor Output Voltage greater than 4.85V and less than 0.20V
Threshold Value
  • Sensor output voltage jump time less than 0.06 sec.
Diagnostic Time
  • 1 sec.
Case 2 DTC Strategy
  • Rationality check negative offset
Enable Conditions
  • Multiplicative Long Term FT less than 0.8 %
  • Adaptive Long Term FT less than -6.0 %
  • IG ON: Before Engine Start
Threshold Value
  • Rail Pressure less than 0.13 Mpa (1.3 bar/18.85 psi)
Diagnostic Time
  • 6 sec.
Case 3 DTC Strategy
  • Rationality check positive offset
Enable Conditions
  • Multiplicative Long Term FT greater than 1.2 %
  • Adaptive Long Term FT greater than 6.0 %
  • Soaking Time greater than 4 hr
  • IG ON: Before Engine Start
Threshold Value
  • Rail Pressure greater than 1.3 Mpa (13 bar/188.54 psi)
Diagnostic Time
  • Immediate
MIL ON Condition
  • 2 driving cycles