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:
Model
Year
Engine
Bank
OBDII Components
- Camshaft Position Sensor
- Catalytic Converter
- Engine Coolant Temperature (ECT) Sensor
- Crankshaft Position Sensor
- Evaporative Emission (EVAP) System
- Exhaust Gas Recirculation (EGR)
- Intake Air Temperature (IAT) Sensor
- Knock Sensor (KS)
- Manifold Absolute Pressure (MAP) Sensor
- Mass Air Flow (MAF) Sensor
- Oxygen Sensor (O2S) - Air/Fuel (A/F) Sensor
- Positive Crankcase Ventilation (PCV)
- Thermostat
- Throttle Position Sensor (TPS)
- Vehicle Speed Sensors (VSS)
On-Board Diagnostic (OBDII) System FAQ
- 5 Most Common Reasons for a Check Engine Light
- Latest 15 Codes Updated
- Top 25 Engine Codes
- Honda B-CAN And F-CAN
- Oxygen Sensor Location
- What is OBDII?
- How does the OBDII works?
- Why is the Engine Light ON?
- OBDII Pending And Active Codes
- How to Reset the Check Engine Light
- Is the OBD system working correctly?
- What does it mean if the Service Engine Soon or Check Engine light is blinking?
- What does it mean if the Service Engine Soon or Check Engine turns on while I'm driving?
- What should I do if the Service Engine Soon or Check Engine light stays on?
- What is Bank 1 and Bank 2?
- Difference Between Open Loop and Close Loop
- What is ECM?
- What is PCM?
- What Is Technical Service Bulletins?
- Vehicle Identification Number VIN Decoder
- 1993-2010 Toyota Oxygen (O2) Sensor Identification
Related Information
- Electric Vehicles
- 2022 Vehicles MPG
- Free VIN Decoder
- What is OBDII?
- How does the OBDII works?
- Why is the Engine Light ON?
- How to Reset MIL
- 5 Most Common Reasons for Check Engine Light
- Top 25 Engine Codes
- Latest 15 Codes Updated
- All OBDII Codes
- Powertrain (P) Codes
- Network (U) Codes
- Body (B) Codes
- Chassis (C) Codes