VW Touran Failed MOT

VW Touran Failed MOT



Original Poster:

2 posts

2 months

Friday 9th July
quotequote all
Hi Guys

2006 Touran, petrol engine. Just failed it’s MOT on the following, any ideas?

Exhaust carbon monoxide content after 2nd fast idle exceeds default limits ( (b))
Exhaust Lambda reading after 2nd fast idle outside specified limits ( (c))
Exhaust carbon monoxide content at idle exceeds default limits ( (b))
Exhaust emits excessive dense blue smoke during acceleration ( (g))

No signs of excessive engine oil usage or a leak, no head gasket signs, and to be honest no excessive smoke whilst driving? I followed it home! No oil in exhaust either? No engine warning lights, no loss of power?

Any ideas? EGRValve? PCV Valve? Blocked breather pipe?



6,345 posts

121 months

Saturday 10th July
quotequote all
The actual print out with the numbers as tested would help immensely.

If it is burning oil as per the fail then I compression/leakdown test would be a good starting point.