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Hey guys just bought a used ej205 sti subaru wrx swap 2004; the code p0134 was there so i bought a new o2 wideband sensor (front sensor ngk) but like 30 seconds after starting it the check engine is back with the same code p0134 ; checked the heater wires and they have good power to them 13volt but what is strange is the sensor signal + and - are both at 3.8volt (with a multimeter) and even if i give gas or let it idle it doenst change they are both at 3.8volt (i already tried to rewire both of them) but my narrowband sensor is working allright and switching from 0-1volt .... what could be wrong i hope not the pcm??? Thanks
 
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