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Oxygen sensor fault Mk 4 Mondeo 2.o TDCi

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Hi All,

I have an oxygen sensor fault PO135 with my Mk4 mondeo 2.0 Tdci. Ive replaced the sensor (which when tested with a multimeter had no continuity in the heater circuit) with a new one and the fault keeps coming back when cleared. There dosent seem to be a 12V supply in any of the pins on the plug when the ignition is switched on. Anyone any ideas? Or a wiring diagram? Any help would be appreciated.

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