The oxygen sensor AF heater bank 2 is located in the exhaust manifold, after the catalytic converter.
2003-2006 Lexus LS 470 P0051
The oxygen sensor AF heater bank 2 is located in the exhaust pipe, below the catalytic converter.
Here are the steps to replace the oxygen sensor AF heater bank 2 on a 2002-2006 Lexus LS 470:
1. Disconnect the negative battery terminal.
2. Remove the rear passenger seat.
3. Remove the trim panel behind the rear passenger seat.
4. Remove the bolts holding the catalytic converter in place.
5. Lower the catalytic converter and disconnect the oxygen sensor.
6. Unscrew the oxygen sensor from the exhaust manifold.
7. Install the new oxygen sensor and tighten it into place.
8. Re-attach the catalytic converter.
9. Re-attach the bolts holding the catalytic converter in place.
10. Reinstall the trim panel behind the rear passenger seat.
11. Reinstall the rear passenger seat.
12. Reconnect the negative battery terminal.
