Diagnosis & Repair
WARNING: This page is about a different car, the 2003 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.
Using hand-held tester or scan tool, read FREEZE FRAME data. Freeze frame data records engine conditions when malfunction is detected. Use Toyota hand-held tester or scan tool to access CURRENT DATA to read output voltage for A/F sensor. ECM maintains a fixed voltage of 3.3 volts at AF+ terminal on ECM and 3.0 volts at AF- terminal on ECM.
For diagnosis and repair procedure, see DTCs P2195 and P2196. The only difference in this procedure will be when asked to check for DTCs throughout procedure, check for DTC P2A00. See DIAGNOSIS & REPAIR under DTC P2195 & DTC P2196: OXYGEN (A/F) SENSOR CIRCUIT (BANK 1 SENSOR 1).