Code P0030

2008 MAZDA CX-7
169,000 MILES • 4 CYL • TURBO • 2WD • AUTOMATIC
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NASER NASER
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Looking in the vac of the motor, this is the A/F sensor on top isn't it? I see the oxygen sensor right below it, but if am not mistaken this is the top one coming out of the manifold isn't it?
Jan 29, 2021 at 10:45 AM
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SEVAG P
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hello,

sounds like front oxygen sensor front one must be replaced, check visually if the connectors are tight and clean.

check our link below how to checko2 sensor and how to replace.

https://www.2carpros.com/articles/how-to-test-an-oxygen-sensor-02-sensor

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Check the pictures and diagram below location of the front oxygen sensor which is number 2 in the diagram 2(picture 2).

check the attached table for steps for oxygen sensor test and troubleshooting.

let us know what happens with you.

thank you.
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Jan 29, 2021 at 12:10 PM
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NASER NASER
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Thanks.
Jan 29, 2021 at 1:04 PM
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SEVAG P
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You are welcome.
Jan 29, 2021 at 1:21 PM