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Home >> Kia >> 2024 >> Niro Plug-In Hybrid EX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (PHEV) (5 Of 9) >> DTC P0402-00: Exhaust Gas Recirculation Flow Excessive Detected >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Monitor the EGR flow
  • Poor connector connection
  • Clogged EGR coolant
  • Clogged or leakage of EGR pipe
  • Leakage of Intake/exhaust manifold
Enable Conditions
  • Fuel cut off active
  • Intake air temperature is greater than -6.75°C (19.8°F)
  • Engine speed is between 992 to 2016 RPM
  • Filtered value of engine speed gradient is between -192 to 192 RPM/s
  • Ambient air temperature is greater than -13°C (8.6°F)
  • Engine coolant temperature is greater than 60°C (140°F)
  • Throttle position is greater than 0°TPS
  • Barometric pressure is greater than 10 kPa
Threshold Value
  • Comparing the reference pressure and a measured pressure is less than 0.72
Diagnostic Time
  • 1s
MIL ON Condition
  • 2 driving cycles