[brucea]

Does anyone have any experience using OBD Fusion for getting O2 sensor data?
I have an 05 4wd DC and am getting PO420/430 CELs.
I can monitor the Downstream O2 sensor V levels but but can't get readings for the upstream O2 sensors.
The levels I'm getting for downstream are approx. .5-.8v except when I initially take my foot off of the gas.. For about 5 secs. after I take my foot of the gas it will drop to .01v but will return to .7v after about 5 seconds. I would like to compare this to the upstream O2 data but so far have been unable to..
I'm using a VeePeak OBD reader.
Any ideas?
thanks

 

[CodyP]

I've got the same issues. I've replaced all 4 sensors (with Denso) and still having issues.

 

[ROAD__DOG]

I've got the same issues. I've replaced all 4 sensors (with Denso) and still having issues.

Did you clear/reset the ECU by disconnecting the battery cables?

 

[CodyP]

Did you clear/reset the ECU by disconnecting the battery cables?

I cleared the codes with a reader but I disconnected to the battery today just to make the ECU learn again so I'll see. I also changed the spark plugs yesterday as the old ones were way past due. Here's hoping.