I'm struggling to get rid of P1646 and P1647 on a 2002 2.1 v6

I've replaced the Oxygen sensor on Bank 2 sensor 1 already and manually measured the voltage but the fault code hasn't cleared.

The annoying thing is using my ELM 327 and Torque Pro (Android) OBD diagnostics I can only get voltage values from the downstream sensors, there's no sensor data for the Upstream ones.

The Upstream sensors don't even show up in the available sensors list.

I've got a picture here... is this normal?

Can anyone else get a live voltage reading for all 4 oxygen sensors via OBD2 on their Petrol X-Type?

Just wondering if I have a weird ECU problem!




Thanks in Advance


Available Sensors in Torque

 

Those are upstream sensor codes, as I think you know. They are utterly different tech (wideband aka linear) to the downstreams and use current not voltage sensing.

It's vital to use the correct kind.

Check fuses & relays, of course.