This video shows the DIY diagnostics and repair for the P0141 "Bank 1 Sensor 2" code. Check the Pinned Comment or below for Timestamps, Part Numbers, and Torque Values:
00:30 Diagnostics from the FSM
02:32 Location of the sensor (post-cat heated oxygen sensor)
03:08 Location of the electrical connector (inside, under the
passenger seat carpet)
03:54 Disconnect the oxygen sensor
04:17 Test the oxygen sensor for resistance across pins 1 and
2 (Good range is 11 to 16 Ohms at 68 degrees F)
06:56 ECM test with a known good sensor
12:54 ECM test with a known bad sensor
14:30 Remove the old oxygen sensor (14mm, if original nuts)
17:18 Remove the old gasket
18:30 Carefully inspect your replacement sensor to be sure it
is not counterfeit: use only a Denso sensor (for this
application, Denso 234-4214)
21:04 Test the new sensor before installing
21:23 New and old Denso sensors, side-by-side
22:32 Transfer the old bracket to the new sensor
23:05 Note about the grommet clamp
23:39 Clean and inspect the gasket surface on the exhaust
pipe
23:52 Be sure to use a new gasket (Denso part includes a
gasket, or use Toyota 89466-20020 or Dorman 47021)
24:10 Install a new cover/shield if missing (Toyota 89437-
60030)
24:15 Install the new gasket, sensor, cover, and nuts (Toyota pinch nuts 90179-08059, or other locking nuts)
25:40 Torque the nuts to 32 ft-lbs
26:49 Connect the sensor electrical
27:43 Clear the code (use a scanner, or disconnect the battery at the negative terminal)
Link for DIY video if you need to replace the oxygen sensor
studs:
https://www.youtube.com/watch?v=strorg3T6AA
Link for DIY video if you need to use an extractor to remove
the nuts:
https://www.youtube.com/watch?v=UhYJMbRuVc8
I hope this video was helpful for you. Thank you for
watching, and good luck with your repair!
I hope this video is helpful for you. Thank you for watching, and good luck with your repair!