What country. ??????????????? why skip this???????????
what engine option (size and cyl count)
what state (California or not?)
are you replacing it, or just curious?
the 02s sensors in USA are 1 before the Cat and 1 behind.
but can vary by if car has 2 or 4 cats.
or if car has Y pipe.
not any one here can guess this.... ever.
unless, you answer above.
now the SHOCKER, WHAT ENGINE>?????
2.3 L 4ZD1 I4
2.4 L C24SE I4 (GM, Aus)
2.4 L C24NE I4 (Euro)
2.6 L 4ZE1 I4
3.1 L LG6 V6 (GM)
3.2 L 6VD1/6VD1W V6
2.5 L 4JA1 diesel I4 (Cameo, TH)
2.8 L 4JB1-T turbo diesel I4
3.0 L 4JH1-T turbo diesel I4
3.1 L 4JG2 turbo diesel I4
for sure.
Fig. Fig. 3: Oxygen sensor-4.3L engines
Fig. Fig. 4: Oxygen sensor-5.0L and 5.7L engines
Fig. Fig. 5: Oxygen sensor-7.4L engines
Oxygen sensors are always numbered like this:
Bank 1 sensor 1
Bank 2 sensor 1
Bank 1 sensor 2
Bank 2 sensor 2
Some manufacturers use a kind of shorthand that reads different, but means the same thing:
Sensor 1/1 or O2s 1/1
Sensor 2/1 or O2s 2/1
Sensor 1/2 or O2s 1/2
Sensor 2/2 or O2s 2/2
Bank 1 is always the side of the engine where cylinder number 1 is located and, of coarse, Bank 2 is the opposite side.
On a 4 cylinder engine, there is only 1 bank and it is always referred to as Bank 1.
Sensor 1 is always the upstream sensor (the one located BEFORE the catalytic converter)
Sensor 2 is always the downstream sensor (the one that is located AFTER the catalytic converter.
Hope helps (remember to rate this).
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