The sensor 2 should be next to the catalytic converter just under the passenger seat. The sensor 1 is in the exhaust manifold.
in the petro tank
There are 2 catalytic converters on a V8 2002 Toyota Tundra. Bank 1 is the manifold and cat on the drivers side and bank 2 is the manifold and cat on the passenger side. Sensor 1 is the sensor on the exhaust manifold before the catalytic converter. Sensor 2 is the sensor located after the cat converter. Bank 2 Sensor 2 is the sensor located after the catalytic coverter on the passenger side.
P0139 02 Sensor Circuit Slow Response (Bank 1 Sensor 2)P0139 02 Sensor Circuit Slow Response (Bank 1 Sensor 2)
Probably the electronics going bad.
only toyota could be this stupid and incompetent...
it is on the fire wall right by the brake booster.
Heated 02 sensor code
where is the oxygen sensor location on a 1998 explorer bank 2 sensor
Low voltage 02 Sensor bank 2.So :Faulty sensorPoor connectionDamaged or broken wire
possibly the head gasget depending on mileage
location bank 1 sensor 1
Bank 1 is the same side as cylinder #1. Sensor 2 is after the catalytic converter.