Bank 1 refers to bank of cylinders. You probably got a triple code code that said something along the line of Bank 1 not optimal or something like that. What it means is that your first bank of cylinders running lean. This is usually caused by fuel injectors, or a leaky manifold. Give me your triple code and I will tell you more.
it has 4 o2 sensors #1 cylinder is sensor 1 or bank 1 sensorType your answer here...
on cylinder 1 side mounted on the manifold
O2 sensor in the exhaust manifold near the engine
try the air flow meter
how to change speedometer sensor on mazda millenia 2000 2.3 v6
oxygen sensor is usually in the rear of the exhaust maifold or in the exhaust pipe itself
Bank 1 is the bank of cylinders that contain cylinder 1. The O2 Sensor 1 is the O2 sensor located in the exhaust system between the cylinder head and the catalytic converter, also known as the "upstream" O2 sensor.
On the exhaust pipe It is before the catalytic converter on the same side as cylinder #1.
Oxygen sensor is located at the exhuast Manifold.
The front oxygen sensor is located on the exhaust manifold of the BMW 318ti. The rear oxygen sensor is located in the head pipe.
Bank 1 should be the side of the engine cylinder #1 is on.
If your 1988 Chevrolet Celebrity has the V6 engine the oxygen sensor is in the middle of the exhaust manifold nearest the firewall. If you have the 4 cylinder engine the oxygen sensor is located in the exhaust manifold just above the exhaust pipe flange.