Im struggling with these problems,can anyone please help???
I have a 2003 318 tourer.In December it failed mot on emissions. the garage replaced the cat and oxygen sensor,at a hefty price.he also replaced cam shaft sensor,plugs and coil packs,plus an oil change.
She ran great for a few miles and then she lacks power,hesitant on acceleration.
I bought a peake diagnostic tool a few weeks ago and it throws up 2 codes- mass flow sensor and catalytic converter conversion.
I replaced the maf last week but still getting same codes.i drive it every day no problems-some days are better than others.sometimes the idle is a little eml, and economy is good.
Please any advive would be fantastic!!