Diagnostic Aids
WARNING: This page is about a different car, the 2003 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
Bank 1 refers to the bank that includes cylinder No. 1. Bank 2 refers to the bank that does not include cylinder No. 1. Sensor 1 refers to the sensor closest to the engine body. Sensor 2 refers to the sensor farthest away from the engine body.