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How do you check if the o2 sensor is broken? My kpro throws p0135 heather circuit malfuction, but i am 110% sure i wired it correctly.

My setup is: EG with a euro K20 and a PRB kpro. O2 sensor is from a RSX-S
 

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throwing a code most likely a dead sensor! :up:
 

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i got a code with my kpro...i changed the sensor and the car runs perfectly...i had the problem for a while and didnt even know. U can tell when u install a new sensor and take the car for a drive...feels 100% better
 

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I JUST had this problem. Froth advised me to take the sensor out and you will see 2 black wires on the sensor. Take 2 wires one coming from + battery and one from - battery and connect each of them to the black wires. It does not matter what order as this heats the sensor up. Have somone hold the sensor by the wires as the sensor gets hot fairly quickly and WILL burn you. This will answer your question as to if its wiring or sensor. I had to replace my sensor and was only able to find one through the BOSS!
 
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