Emissions Light on - lambda just replaced!

[v15ben]

Had the pre-cat lambda sensor on the 182 replaced 2 weeks ago and after about 300 miles driving the emissions light is back on again!

My thoughts are that it's either the same problem, it wasn't repaired properly in the first place or it's just another problem to add to the collection!

Has this happened to anyone else and what would you suggest?

I'm thinking of leaving it for a few days till the car decides which faults to prioritise and if the light stays on or not!

 

[Da]

Could be the post cat sensor now.

Is the car running ok?

 

[v15ben]

Yep car ran fine before the pre-cat sensor was replaced. No difference in revs, idle or MPG. No difference now either.

The garage did a full diagnostic test on the car and the post-cat sensor came back as working fine.

Strange!