Diagnosis & Repair
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.
NOTE:
Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When trouble shooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.
For wiring diagram, 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) . For diagnosis and repair, see Fig 1 and Fig 2 . To check ECM, see PIN VOLTAGE CHARTS article. For ECM location, see ENGINE CONTROL MODULE LOCATION under SELF-DIAGNOSTIC SYSTEM. For removal and installation of components, see REMOVAL & INSTALLATION - 4-CYLINDER article.