I have a P0136 error code with a readout of bank 1 sensor 2 sensor malfunction. I learned that this is the rear O2 sensor. I found the sensor under my truck, but the wiring runs from the exhaust pipe into a rubber gromet in the floor under the passenger seat. I want to replace the sensor myself but do not know where I should look for the connector. Do I need to remove the passenger seat to find the connector?