Fiestamk6123 Posted October 19, 2018 Share Posted October 19, 2018 Hi does anyone have access to a wiring diagram to a mk6 fiesta 2003 o2 sensor as i am having problems, 3 out of 4 wires are showing battery voltage meaning its grounding where it shouldnt, technician stated that only one should be showing that voltage which is the earth wire and the other two should be signal wires for o2 sensor to relate information to ECU. Needs wiring diagram to figure out where tge problem is. Many thanks in advance Quote Link to comment Share on other sites More sharing options...
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