If you are running a KPRO ECU you can SKIP THIS STEP. You will need to source this connector from your OEM engine harness make sure to leave 2-3in of wire for you to make all of your connections.

Unlike the primary AFR sensor, the secondary o2 sensor is not necessary in most cases. If you are using the Hondata KPRO you can disable this sensor and you do not need to connect it. If you are using a “SWAPECU-K,” this may not be necessary to connect either. Check to make sure the sensor has been disabled before continuing.

Secondary o2 sensor compatibility:  2002-2004 RSX Type S (& Base 5spd)  2001-2006 Integra Type R & Type S  2002-2005 Civic Si EP3

Sensors that ARE NOT compatible:  2005-2006 RSX Type S  2006+ Civic Si

For a guide on hot to disable the secondary o2 sensor in the KPRO software, please go to the Hondata KPRO setup section of the guide.