Suzuki Wagon R Manual page 2123

6-2-120 ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE)
DTC P0401 Exhaust Gas Recirculation Flow Insufficient Detected
DTC P0402 Exhaust Gas Recirculation Flow Excessive Detected
System/Wiring Diagram
1. EGR value
2. Intake manifold
3. ECM
4. Sensed information 7. "IG COIL" fuse
5. Fresh air 8. Relay box
6. Exhaust gas 9. Ignition switch
10. Main relay