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Home >> Hyundai >> 2021 >> Ioniq Plug-In Hybrid Limited >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (PHEV) (2 Of 3) >> DTC P0401: Exhaust Gas Recirculation Flow Insufficient Detected >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Signal Monitoring
  1. Poor connection
  2. EGR circulation path blockage and leakage
  3. Blocking of intake system
  4. EGR valve stuck closed
  5. EGR valve
Enable Conditions
  • -
Threshold Value
  • 1.45 kPa or higher for the comparison between the reference pressure variation and the measured pressure variation (Comparison between the EGR valve opening/closing pressures)
Diagnostic Time
  • -
MIL On Condition
  • 2 driving cycle
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