ScanTool question...

[MatteMan]

I have bought a obd2 reader and been using ScanTool.net software.
And my question is, when I looking at the 02 sensors it only showing two of the four sensors? Why is that, is it possible that two of them ar broken? Because I have problem whit the exhaust emission here in Sweden, on my car it´s only two catalytic converters. Either the catalytic converters are empty or some of the 02 sensor are broken?

02 Sensor 1 Bank 1 is swing between 0.095 - 0.885 V
02 Sensor 2 Bank1 is just swinging between 0.070 - 0.280 V ...Broken?

 

[MatteMan]

Someone having an idea? :SNSign:

 

[Brute03]

i don't see any problem. i see read outs for sensors 1 & 2 bank one and sensors 1 & 2 bank two. remember, there is no sensor 3 and 4. it's one and two or upstream and downstream for each bank

 

[MatteMan]

i don't see any problem. i see read outs for sensors 1 & 2 bank one and sensors 1 & 2 bank two. remember, there is no sensor 3 and 4. it's one and two or upstream and downstream for each bank

Ok thanks, so sensor 1 and 2 "bank 1" is in other words the 2 sensors in front of the catalytic converter? (upstream) and sensor 1 and 2 "bank 2" the 2 sensors behinde the catalytic converters. (downstream) Pleas correct me if I´m wrong.

Then it´s not a problem with them I think, so it has to be my catalytic converters that is the problem for the high exhaust emmision.

 

[Mike97gt]

you want to make sure the upstream 02 sensors switch back and forth from low voltage to a higher voltage, and the rear 02's take longer to get a reading becuase they take longer to warm up. but after they do they should not switch with the front sensors. you should see a somewhat steady voltage from them. if you see sensor 1+2 switching just about the same amount then the cat converter is bad.