2003 Saturn ion. 2.2 motor. Bank 1 sensor 2 o2 error. Is that sensor located before or after the cat

SOURCE: Oxygen sensor location on a 2003 Saturn Ion-1

One is front of the cat, and one after the cat of the exhaust.
The OBD Scanner should tell you which bank is producing the error.
Bank one is the front one.

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SOURCE: bank 2 sensor 1 o2 sensor

should be right behind the cat converter

SOURCE: location of the bank 1 sensor 2 O2 sensor on a 2001 ford escape

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

SOURCE: location of o2 sensor bank 1 sensor 2

Bank 1 sensor 2 is the O2 sensor behind the catalytic converter.

ZJ Limited

• 17989 Answers
• Posted on Mar 28, 2012

SOURCE: is bank 1 sensor 1 same side as bank 2 sensor 1

Check this possible engine locations...



Hope this helps.