Circuit Description
WARNING: This page is about a different car, the 2003 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
Heated Air/Fuel (A/F) sensor monitors exhaust gas oxygen content and delivers input signals to ECM. Heated A/F sensor is located on exhaust pipe in front of catalytic converter. A/F sensor may also be referred to as A/F sensor (bank No. 1 sensor No. 1) or A/F ratio sensor. ECM uses input signals to determine fuel injection system operation.