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O2 Sensors Doc Codes


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Hi new member hoping for help,

I have a 2005 Ford Focus titanium 1.6 115 beds

Eml came on fuse blown on o2 sensor circuit, replaced fuse all wiring seemed OK unplugged front sensor ran engine fuse blew again, plugged front sensor in unplugged rear sensor good for a few miles then blew again. I plugged both sensors back in and put a higher amp fuse it was good again for a few miles and Mel came back on with codes p0057 and p0156, any ideas is it just a faulty sensor, if so which one or both? Any ideas.

Thanks Ian

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