April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P0136: Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2) & DTC P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2): Notes

WARNING: This page is about a different car, the 2003 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For component location, see appropriate illustration in THEORY & OPERATION article.