Fuel grades; Sooty Exhaust Tail pipes And Post - Cat Lambda Faults.

[bazzbazz]

Just to clarify, what sensor did you replace and what warnings/error codes are you getting?

[kaleuclint]

It's the rearmost sensor in the system, Bazz.  I'll need to ask Seb what the code is.  Could be on the invoice.

The signal triggered this morning on a very low tank and I can't remember what grade of fuel was in it; months since last fill.

[bazzbazz]

Ok, I'll assume your referring to the rear most O2 sensor?

Just need the codes before I can offer any wisdom.