Are there such things as u[stream and downstream O2 sensors?

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Jul 14, 2015

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What is your question?

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Are there such things as u[stream and downstream O2 sensors?

What is your question?

MAM0412 in Pensacola FL

Jul 14, 2015

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Michael Moenchon Jul 14, 2015

Yes, there are both up and down stream Oxygen sensors. Up stream oxygen sensors are the sensors that are in the exhaust system before the catalytic converter(s). The down stream sensors are located in the exhaust after the catalytic converter.

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Popular Answer

What are the best Volkswagen repair shops?

RepairPal Certified shops can diagnose and repair your 2009 Volkswagen Beetle. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.