Circuit Description
WARNING: This page is about a different car, the 2003 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
For circuit description, see DTC P2195: OXYGEN (A/F) SENSOR SIGNAL STUCK LEAN (BANK NO. 1 SENSOR NO. 1) & DTC P2196: OXYGEN (A/F) SENSOR SIGNAL STUCK RICH (BANK NO. 1 SENSOR NO. 1) . DTC detecting condition is: in conditions (warmed up engine, during vehicle driving at engine speed 1400 RPM or more and vehicle speed is 38 mph or more), when the air-fuel ratio (A/F) sensor output voltage change value is below the regular value against the fuel trim change value, the engine control module (ECM) judges that A/F sensor circuit has slow response (2 trip detection logic).