Articles - Toyota Engine Bank 1 and Bank 2 A/F and O2 Identification
Toyota Engine Bank 1 and Bank 2 A/F and O2 Identification
This page provides information on the proper identification of engine bank 1 and engine bank 2 for correct A/F sensor and oxygen sensor replacement. Contains information that identifies engine bank 1 and engine bank 2 on the
following engines: 1AZ-FE, 2AZ-FE, 2AZ-FE (PZEV), 1GR-FE, 2GR-FE, 2JZ-GE, 1MZ-FE, 3MZ-FE, 1UR-FE, 3UR-FE, 2UZ-FE, 5VZ-FE, and 1ZZ-FE.
Bank 1 (B1) refers to the bank that includes cylinder No. 1.
Bank 2 (B2) refers to the bank opposite bank 1.
Sensor 1 (S1) refers to the sensor that is located before the catalytic converters.
Sensor 2 (S2) refers to the sensor that is located after the catalytic converters.
Toyota Applicable Vehicles:
Toyota Camry
2003-2006
Bank Identification
Toyota FJ Cruiser
2007-2010
Toyota Highlander
2001-2003
Toyota Highlander
2004-2007
Toyota Highlander
2008-2010
Toyota Highlander HV
2006-2010
Toyota Land Cruiser
1998-2007
Toyota Land Cruiser
2008-2010
Toyota MR2 Spyder
2000-2005
Bank Identification
Toyota RAV4
2001-2003
Bank Identification
Toyota Sienna
1998-2003
Bank Identification
Toyota Sienna
2007-2010
Bank Identification
On-Board Diagnostic (OBDII) System FAQ