Diagnostic Chart

DETECTING CONDITION AND TROUBLE AREA
HINT: After confirming DTC P0125 use the OBD II scan tool or LEXUS hand-held tester to confirm voltage output of heated oxygen sensor (bank 1 sensor 1) from CURRENT DATA.
If voltage output of heated oxygen sensor (bank 1 sensor 1) is 0 V heated oxygen sensor (bank 1 sensor 1) circuit may be open or short.





WIRING DIAGRAM








INSPECTION PROCEDURE