Hi all,
My SES light came on recently and after having it diagnosed, I need to replace my Bank 1 Sensor 1 O2 sensor. It's a 4 cylinder (2003), so I know there are only two O2 sensors, but upon checking it out in my Haynes manual, the two sensors are descirbed as upstream (in the exhaust manifold) and downstream (behind the cat). Can someone please confirm which one is the Bank 1 Sensor 1?
Thanks in advance for your help.
Chris