On your V6 engine : Bank 1 is the passenger side of the engine Sensor 1 is in the exhaust pipe ( or exhaust manifold ) before the exhaust enters the catalytic converter ( upstream )
in the exhaust pipes behind & in front of converters
Sensor one is in the exhaust manifold on the back of the engine. Sensor two is in the side of the catalytic converter.
On a 2000 Ford Ranger ( 3.0 and 4.0 litre V6 engines ) Bank 2 is the drivers side of the engine Sensor 1 is close to the engine ( it might even be in the outlet of the exhaust manifold ) BEFORE the exhaust enters the catalytic converter
it is on the engine near the rear above the block and next to the firewall
The P0155 refers to the Oxygen sensor on Bank 2, sensor 1. Bank 2 on your vehicle is on the passenger side of the engine. Sensor 1 is the first oxygen sensor in the exhaust pipe coming from the engine.
the oxygen sensor(sensors)
could be the oxygen sensor. that's what it was on mine.
What is a carbon dioxide sensor?
The oxygen sensor on a 2000 Silhouette is mounted to the exhaust system. To replace it raise the vehicle and safely secure it. Make sure the engine is cold. The sensor is thread in to the exhaust pipe. Loosen the sensor and unplug it. Replace the sensor.
A 2000 Dodge Ram diesel does not have an oxygen sensor.