156 1.8TS - MOT fail emissions off the scale
my dad has a 156 1.8TS which failed its MOT due to emissions today. The reading was way over the level set to pass the test. Main problem is that there aren't any Alfa dealers close by and the only Fiat garage is a really poor one.
The car has been running fine, does it sound like the catalytic converter has been exhausted? Could a sensor be a problem? A lambda sensor gave up about 2 years ago but that also affected the way the car drove.
Any ideas welcome