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1999 Subaru Forester Repair Question


Topics covered: Sensor, Engine, Firing order.
Mileage: No information provided.

Asked on March 4, 2009

1999 Subaru Forester computer code for O2 sensors

Computer problem
1999 Subaru Forester 4 cyl All Wheel Drive Manual 110000 miles

Could you tell me which O2 sensor needs replacing if the code readout indicates "Sensor 1 Bank 2"?
The engine type is EJ253 - AWZVB. Thanks.
Avatar Asked by dybs

Answer

Replied on March 4, 2009

Hello
Thanks for the donation

Sensor 1 refers to the oxygen sensor closest to the engine. Bank 2 refers to the side that the number 2 cylinder is on. Below is a firing order diagram so you know which side is Bank 2 of your engine..


http://www.2carpros.com/forum/automotive_pictures/261618_Noname_282.jpg



You can always test the sensor before replacing it. To learn how to test an oxygen sensor, follow the link below..

http://www.2carpros.com/how_to/how_to_test_oxygen_sensor.htm

Thanks for using 2CarPros.com!

Tiny Answered by bluelightnin6 (expert)
17,236 answers provided
Replied on March 4, 2009

So, am I replacing the sensor before the cat conv. or after it?

Tiny Response from dybs
1 question asked
Replied on March 4, 2009

Starting from the rear of the vehicle and moving towards the front, it will be after the converter. One closest to engine.

Tiny Answered by bluelightnin6 (expert)
17,236 answers provided