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How many oxygen sensors do I have?

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Old May 4, 2012 | 01:38 PM
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Mevissen's Avatar
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How many oxygen sensors do I have?

How many oxygen sensors on a 1999 3.8 camaro exhaust and when should they be replaced
Old May 6, 2012 | 10:03 AM
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Re: How many oxygen sensors do I have?

Since no one responded, I looked at the 98 shop manual for the 3.8L V6, and assuming your 99 is the same, you have three heated O2 sensors. Appears one pre-cat sensor on each bank (side) of the engine and a an after-cat sensor.

There is no defined replacement period. Are you having signs of problems with the sensors?
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