Unleash Engine Potential Troubleshooting Bank 1 Sensor 2

two are directly below the intake/exhaust manifolds, and the third is at the skid, by the transmission. there are four oxygen sensors...two ... Just want know where Bank 1 Sensor 2 is located? Is it the one furthest away from the engine directly behind the cat about halfway down the car? The cylinders order are correct but on the Tacoma's 4.0 along with many toyota engines, Bank 1 is located on the same side as cylinder 1( ... Generally bank 1 and 2 will use the same type of O2 sensor so the computer is seeing apples to apples readings, but as others have mentioned ... Bank 1 is right side (passenger). Sensor 1 is the one right at the motor. Sensor 2 is the one AFTER the catalytic converter. On a single-cat ... Bank 1 means the front bank that is facing the front of the car? Sensor 2 means after the catalytic converter? 4 cyl engines only have a single bank, v based engines have two. Sensor 1 is primary, sensor 2 is post cat. A single cylinder bank has two oxygen sensors: one before the catalytic converter (upstream), and one after (downstream). The first one gives ... Correct...the upstream are one part number and the downstream are another. Identical parts on left and right. I would go with the AC Delco OEM ... This code shows it is the oxygen sensor for Bank 1, Sensor 2. Where exactly is this sensor located? I think this is the passenger side lower sensor.