Fault codes advice

[Mike6]

Dig Dig. Or I would if the ground wasnt so frozen

[Jcm325]

Thanks guys
The car is in the garage on Friday, they're going to do a smoke test and take some live data from the sensors.
They did say though that the heater fault on the sensor will need a new sensor and if you're doing one its wise to do both.

[Jcm325]

Went to the garage today
No vacuum leaks
Fuel trims good
Catalytic converter operating correctly
Only faults during live diagnostic were the heater on the o2 sensor and that sensor was operating but in a different range to its counterpart
They've recommended change at least one sensor but I think it's worth doing both while we're in there
It'll be a few weeks before I do this as I'm away on a course and the garage would like the fault codes to appear again before they commit
I'll update when it happens

[Jcm325]

For info the sensors are not the same part number and they are slightly different lengths
One is 990mm long and the other is 1005mm long
I'm going to try and get some penetrating fluid on the fittings to soak in while I'm away so hopefully there's no drama when we come to remove them.