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2010 Mazda 5 How to Troubleshoot Oxygen Sensor

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Check all combinations of the pins of problematic sensor. See comparison chart above (with the new replacement sensor).

If you do not have such a tester, a normal multimeter (resistance and capacitance) should be sufficient

If you would like a transistor tester, you can search Aliexpress for one. It is an amasing little device. https://www.aliexpress.com/item/10050015...

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