Assuming you mean bank 2 sensor 1, it would be the first O2 sensor located in the header pipe after the passenger side exhaust manifold.
On a 2003 Chevrolet Blazer, bank 2 sensor 1 refers to the upstream oxygen sensor located on the passenger side of the vehicle's engine. This sensor is positioned before the catalytic converter in the exhaust system. To access it, you typically need to lift the vehicle and may require some tools to remove any obstructions.
pass.side at exe manifold Bank 1 is where cylender 1 is. Bank 2 is on the other side of which is on the passenger side of the blazer. Oxygen sensor 1 is the first sensor closer to the front of the blazer. Sensor 2 would be past the catalytic converter on the same side.
The bank 1 sensor 2 on a 1996 Chevy Blazer is mounted in the exhaust. Sensor two is just behind the catalytic converter.
I have a code DTC P0154.Bank 2 Sensor 1 no activity.Which sensor is this on my 96 Blazer?
It has 1 coolant sensor, 1 temperature sensor
It does not have 1
Trouble code P0135 means:O2 sensor heater circuit malfunction (Bank 1 Sensor 1)
O2 sensor circuit bank 1 sensor 2 no activity. Check the wiring and connections to bank 1 sensor 2 O2 sensor, if all looks good replace the sensor.
10 1/4 pints
driver side first o2 sensor
Upstream, driver side.
bottom of engine 1 bolt pull it out and put the new one in