MisterRoy
Active LVC Member
From what I've been reading, upstream sensor voltage bounces around and downstream voltage should stay consistent. I am monitoring my 02 sensors via Forscan. It seems that the upstream sensors are working as expected. The downstream, well, I have one that I've observed around.74 - .85 volts consistently. The second is bouncing around like the upstream sometimes, and others it may be consistent, like the other. The car temp was 205 degrees according to the coolant sensor the last time I witnessed this activity.
If a downstream sensor is bouncing around, is that indicative of a bad sensor or a malfunctioning cat? If I am not understanding something, educate me.
Thanks!
MisterRoy
If a downstream sensor is bouncing around, is that indicative of a bad sensor or a malfunctioning cat? If I am not understanding something, educate me.
Thanks!
MisterRoy