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Home >> Hyundai >> 2021 >> Elantra N Line, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 34 (Engine Control System Diagnosis - 2.0L (Except HEV) (3 Of 6)) >> DTC P0402-00: Exhaust Gas Recirculation Flow Excessive Detected >> DTC Information And Inspection >> DTC Detecting Condition

DTC Information And Inspection: DTC Detecting Condition

WARNING: This page is about a different variant/trim than selected.
Item Detecting Condition Possible Cause
DTC Strategy
  • EGR flow check
  1. Poor connector connection
  2. EGR cooler restricted
  3. EGR pipe restricted/leaking
  4. EGR circulation path clogging and leakage
  5. Intake manifold
  6. Exhaust manifold
Enable Condition Case 1
  • Activated EGR valve control
  • Engine running more than 20s
Case 2
  • ECTS is more than 55°C (131°F)
  • AATS is more than 9.8°C (49.64°F)
  • Battery voltage is more than 5V
Threshold Value Case 1
  • PWA value for valve control is more than 99%
Case 2
  • PWA value for valve control is less than -99%
Diagnostic Time
  • 0.5 seconds
MIL ON Condition
  • 2 driving cycles
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