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    Daewoo Nubira 20021.6 DOHC A16DM Archived Message

    Posted by Jim watson on August 16, 2007, 8:18 pm

    Hi all, this Nubira had a code P0141 Lambda sensor (B1 ,S2)heater circuit, however resistance and voltage of the 4 wire post cat sensor are both good, however the pre-cat sensor is a 2 wire one, black wire signals ok(usual .2 to .8 volts)I assume the other wire is a heater supply earthing through the sensor body, but no voltage was noticed on this wire(also does not have continuity to earth) , I initially wondered if that was it's purpose. It also has codes p0481 Coolant fan high speed relay circuit fault and one for low speed also however customer assures me fan works ok, any ideas?

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