1A
DTC P0409: Exhaust Gas Recirculation Sensor Circuit
NOTE:
Priority when dealing with a number of DTCs:
If DTC P0409 and DTC P0641 are detected, deal with DTC P0641 Sensor Reference Voltage 1 Circuit/Open first.
Detecting Condition
Status displayed on SUZUKI scan tool Detecting condition Indicator / Warning light operation
D1 Below minimum threshold Does not light
D2 Above maximum threshold
Troubleshooting
Check the connection and condition of the EGR valve connector.
Repair if necessary.
Check the condition and connection of the ECM “C47” connector.
Repair if necessary.
Check for 5 V on “C46-4” terminal of the EGR valve connector.
Check for earth on “C46-5” terminal of the EGR valve connector.
Repair if necessary.
Check the continuity and insulation of the following connections:
• Between “C47-17” terminal of the ECM connector and “C46-4” terminal of the EGR valve connector.
• Between “C47-27” terminal of the ECM connector and “C46-6” terminal of the EGR valve connector.
• Between “C47-37” terminal of the ECM connector and “C46-5” terminal of the EGR valve connector.
Repair if necessary. If DTC P0409 is still detected, replace the EGR valve.
If DTC P0409 is still detected, replace the ECM.
After Repair
Deal with any faults detected by SUZUKI scan tool.
Clear the DTC.
Carry out a road test followed by another check with the SUZUKI scan tool.