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Q: I've scanned the above car and got a trouble code P1166. on 2003 Honda Civic

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I've changed the HO1S and HO2S but the light was still on. I've then changed the exhaust gas completely but the light still remained. Can you please advise about what may cause this?
(2) Answers
Did you use a Honda sensor or aftermarket? Could also be a wiring problem or PCM needs updated software or replacement.
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