Took my Classic Jap 95' WRX for MOT last week and it failed because of emissions being high. (The first time is over 4 years). I hadn't driven it for just over 6 weeks because I will in hospital (another story, had pneumonia). Had to jump start the battery with a power pack thing...

Anyhow, I was told that it could be the Lamda sensor needs replacing... and that's why I think the emissions were reading too high... Lamda sensor could be dirty and needs cleaning...???

Could this not be cleaned??? Is this an expensive replacement.

Thanks in advance.

 

Just replaced mine cos it was 8 years old and had done 110k. At a lower mileage I'd have had a crack at cleaning it, although it would probably need soaking in carb cleaner or something for a while to really get it sorted. You can get universal ones off ebay for £50 but I got one from Subaru in the end.

I wouldn't replace it until you've done an error check to find out what component it is that's failed. Emissions problems are nothing to do with having to jump start the car.