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O2 sensor question

NCH
NCH
in Ford Fiesta Club

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Engine management light has illuminated and codes indicate both ,O2 sensors are the issue.  Replaced both and cleared the codes yet the same codes reappear.  Any ideas

  • Quote


    What were the codes?  Did you buy good sensors or cheap eBay ones?  Have you got forscan?   I think forscan can show you the voltage output from the sensors, does that vary when you rev engine? 

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