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Hi guys just replaced water coolent temp sensor and Thermal resistor Board for blowers, Now i have this code that comes up P0141 comes up fault 02 pend 00
then when i scroll i get this 01/02 then next scroll is 02/02 now i know its O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2) but cant find what the other one is, Or does this mean both 02 sensors have got pre cat and post cat.

Thanks for any help
 

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Hi there i believe that both sensors are the same, but its not certain, they consist of two sections, the black and grey wires are for the sensor itself to keep the mixture in the engine correct, the two white wires are for the heating element and should have 12 volts across them when the engine is cold and running, the resistance across the element is about 5 to 12 ohms or there abouts....Fred in Essex.
 
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