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Civic Si
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EGR System (Except Hybrid)
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DTC Troubleshooting
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Notes
DTC Troubleshooting: Notes
DTC INDEX
DTC
Description
DTC P0401
EGR Insufficient Flow Detected
DTC P0404
EGR Valve Insufficient Lift**
DTC P0406
EGR Valve Position Sensor Circuit High Voltage**
DTC P1491
EGR Valve Insufficient Lift*
DTC P1498
EGR Valve Position Sensor Circuit High Voltage*