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The two manifolds are named "Bank 1" and "Bank 2", with "Bank 1" describing the manifold that is closer to the passenger compartment, and "Bank 2" describing the manifold that is closest to the front of the car. "Sensor 1" is located between the manifold and the catalytic converter, while "Sensor 2" is located between the catalytic converter and the joint of the y-pipe.
Found this firing order.
As far as the sensor, you talking about 02 sensor? Bank one has the number 1 cylinder, bank 2 is the other bank, sensor 1 is the first sensor you come to, in the exhaust.
bank one is the side of motor that has #1 cylinder sensor is after the cadilitic converter ,replacement is very probal ,we all here need 1)year2)make3)model4)motor size.
The firing order is 1-2-3-4-5-6, and here is a firing order diagram to help assist you and let me know if you need any help to understand this diagram, or if you require any further assistance.
You typically would like to do further diagnosis, however on these cars, the Denso sensors are very common to fail, and are the cause of the light 99% of the time, especially if it is the only code set.
Bank 2 sensor 1 is located on the top of the exhaust manifold on the radiator side of the engine. You will need an O2 sensor socket or a small 22mm wrench to remove it
B1 means the sensor is located on the same bank of the engine that has the #1 cylinder. B2 is located on the opposite bank.
S1 means the sensor is located BEFORE the catalytic converter
S2 means the sensor is located AFTER the catalytic converter
You didn't say which engine you have, so I've included the diagrams of both 4 cyl and 6 cyl so you can see the banks
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