o2 sensor cls 320 cdi

[ThinkPad]

I have had a current fault showing on the star machine for upstream o2 sensor.

Some people I have spoken to say that I should change, as it may effect mpg and may be clogging the dpf.

Other people are telling me that just leave it as it is, if no CEL is on and no adverse performance there is nothing to worry about.

As the part is £230 I am not sure what to do...any advice?

 

[television]

I would leave it, these faults can go away as easily as they came, it could also be a slight MAF fault as the 2 work hand in hand

 

[ThinkPad]

Thanks for the reply.

Local specialist told me that it could be damaging the DPF so this is what was worrying me, as they said this would be a £1,000 fix.

Although nothing to do with DPF came up on star.

Any other views?

 

[ThinkPad]

Think I have decided to leave as is. If a CEL comes on then I will worry about it.

Although in the back of my mind, I am still thinking could I be achieving better economy!? Have read a few threads, and opinions are very much split.

Thanks Television.