Catalyst, Oxygen sensors graphs

4 cylinders have 2 oxygen sensors, and 6 cylinders usually have 4 oxygen sensors. If upstream looks like a sine wave and downstream looks like a horizon, the oxygen sensor and catalyst both are in good shape. The total cost of purchasing OBD2 scanner with software is only about U$15.00

SunJoo Moon , Create Date: Sept. 24, 2021, 6:56 a.m.

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Nov. 20, 2023, 11:19 a.m. - SunJoo Moon moderator  ¶

자가 정비에는 비싸지 않는 OBD2와 토크프로등 만 있어도 좋을듯 하다.

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