MOT failure - emmisions - 2005 mini one

[Mdsmith15]

Hi all,

My mini failed it’s mot in the emmisions test, as per the attached image.

The tester said to try some cleaner/additive to the fuel tank, but is the solution as simple as this?

It has had a full exhaust replacement within the last 3 or 4 months.

Any suggestions appreciated!

Matthew

[steve-5snwi]

Is it a standard exhaust ? Any exhaust leaks ?

[Mdsmith15]

Thanks for the reply, it’s a standard exhaust (recently replaced with parts from eurocarparts), and no leaks.

I haven’t had the car serviced, so am keeping my fingers crossed that a good dose of Redex will help.

[stevensdrs]

Get it serviced. Dirty air filter will cause high co readings.

[Sell me cake]

Replace spark plugs
Take car for a good run
ERG could be going out

[Mdsmith15]

Thanks for your replies.

Retest completed yesterday with CO emissions down to 0.01 from 1.44%...

The things I changed were the pre-cat O2 sensor which was throwing a fault code (and still is despite clearing it numerous times) and a bottle of redex...

Either way, it’s all sorted now!

[E-bmw]

Give it an oil/filter/air filter & plug change too as was recommended by others above.

[geeks]

As per the others give it a service (plugs, filters, oil etc) and then take it for a good ol' fashioned Italian tune up!

[watchnut]

On my old V70 diesel (1999 and 221k ) always warm it up over a few miles, then blat it on the red line from junction 2 to 1 on the M27....gives it a real "decoke" stacks of st out of the back....straight into the MOT appointment... with a red hot engine.....pass

also keep it serviced when required. never let me down in 19 years! ( well apart from the lower wish bone failure last week, and an advisory on a anti roll bar link both replaced including MOT/retest = pass £214 in all for another years motoring for the wifey ...result