V70 P3 T6 Emissions (MOT Fail)

[Jonny Jimbo]

Hi all,

As well as the headlight issue, my V70 T6 AWD also failed it's MOT on emissions. I'm not sure why though.

At idle the emissions were very clean and well under the limit, however at fast idle they carbon monoxide and the 'lambda reading' shoot right up. I would have thought that it would be the other way round, and it would be worse at idle.

I have tried a bottle of Cataclean, so we shall see if that helps, but in the mean time does anyone have any idea about what might be causing it?

[Tatsfield]

The first thing to do would be to check the system using a VIDA/DiCE diagnostic and see if the lambda sensor is operating within tolerances. You might have a faulty lambda which is an easy task to screw out the old and screw in a new one.

[AlexV70Drive1]

Originally Posted by Jonny Jimbo

Hi all,

As well as the headlight issue, my V70 T6 AWD also failed it's MOT on emissions. I'm not sure why though.

At idle the emissions were very clean and well under the limit, however at fast idle they carbon monoxide and the 'lambda reading' shoot right up. I would have thought that it would be the other way round, and it would be worse at idle.

I have tried a bottle of Cataclean, so we shall see if that helps, but in the mean time does anyone have any idea about what might be causing it?

Warm it up and give it a good blast around in low gears high revs down the motorway and on the way to the motorway if it’s safe to do so. (Don’t need to break and speed limits just keep it up the revs) it’s call and Italian tune up and that will clear some S*** out of it! If you have a lambda sensor gone then this won’t do a lot but it will if you usually drive it with low revs and a lot of stop start driving won’t help. Make sure it’s warmed up before the mot and give it another blast on the way to the retest and it will fly though the mot I would put money on it mate. Emissions are a joke lol.