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primary sensor shows 0 voltage , no change while running

Posted: Mon Nov 18, 2013 7:24 am
by perspective
I have a ep3 with stock k20a3, injen sri, hks exhaust. I have both o sensors plugged
Before kpro I had a check engine light, it was for either the primary or secondary o sensor.
Now after kpro III, No check engine light but when running a datalog I can't see any voltage on primary o sensor
this means either the wiring or the sensor are faulty right? please help

Re: primary sensor shows 0 voltage , no change while running

Posted: Mon Nov 18, 2013 11:30 am
by Spunkster
sounds logical.

Re: primary sensor shows 0 voltage , no change while running

Posted: Mon Nov 18, 2013 10:06 pm
by perspective
I still get afr readings, and the car runs fine. Secondary o2 is working .
I don't get any codes or errors. If the primaryo2 sensor was faulty wouldn't the car run bad???

Re: primary sensor shows 0 voltage , no change while running

Posted: Tue Nov 19, 2013 10:25 am
by Spunkster
What is the exact error code you are getting?

Re: primary sensor shows 0 voltage , no change while running

Posted: Tue Nov 19, 2013 9:03 pm
by perspective
I don't get any codes now. I'm using prb with the kpro. With my pnf I had a code for the o2 sensor , I do not remember which one (believe it was for the secondary o2).

Ugh I guess I need to put back the pnf to find out the code....
This is a DD , and I'm afraid I'll damage the engine