martin l

Hi all I am in need of some advice please. Last year my local garage put a new (bog standard) exhaust, cat and lambda sensor. The car then failed it's mot at first then passed on 2nd attempt. 1st time in 7 years it failed on emmisionnsAnd now it's failed again on emmisionns. I am at a complete loss on what to do next any advice suggestions appreciated.I added cataclean and gave it a good run prior to the test.