How many 02 sensors does an 06 chrysler 300 2.7 engine have? I need help.

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A V6 engine will have 4 sensors, 2 on each "bank" of cylinders. One before each catalytic converter, and one after each one. The one before the converter will measure for exhaust gases before the catalytic converter, and the one after it will measure for exhaust gases after the converter does its job. What problem are you having?