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Home >> Suzuki >> 2007 >> Aerio Base, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P0401 / P0402: Exhaust Gas Recirculation Flow Insufficient / Excessive Detected >> DTC Detecting Condition and Trouble Area

DTC Detecting Condition and Trouble Area

DTC DETECTING CONDITION CHART

DTC detecting condition Trouble area
P0401: 
Difference in intake manifold absolute pressure between opened EGR valve and closed EGR valve is smaller than specified value.
(2 driving cycle detection logic)
P0402: 
Difference in intake manifold absolute pressure between opened EGR valve and closed EGR valve is larger than specified value.
(2 driving cycle detection logic)
  • EGR valve
  • EGR valve circuit
  • EGR passage
  • Manifold absolute pressure sensor
  • ECM
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