Backprobing 02 sensors
Thread Starter
Teching In
Joined: Dec 2004
Posts: 17
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From: Stockton Ca
Backprobing 02 sensors Hey guys just have a quick question since I dont have access to a scan tool. I want to check my 02 sensors to make sure they are functioning properly, is it possible to backprobe the 02 sensors to make sure they are not being lasy or stuck below .5 volts or above?
Originally Posted by ricehater2000
Hey guys just have a quick question since I dont have access to a scan tool. I want to check my 02 sensors to make sure they are functioning properly, is it possible to backprobe the 02 sensors to make sure they are not being lasy or stuck below .5 volts or above?
A modern DMM will do the job pretty much, you only need
to see that the voltage wanders at idle and pegs high at
WOT. A roughly 450mV, not-moving voltage is a sign that
the PCM has faulted the sensor.
to see that the voltage wanders at idle and pegs high at
WOT. A roughly 450mV, not-moving voltage is a sign that
the PCM has faulted the sensor.
