MOT Question....

[ST270]

If a car has an engine management light on (fault code) which remains on will this constitute a fail of an MOT?

My car has had the timing chains, tensioners and guides etc replaced this year due to the fault code 17755 (incorrect correlation between engine sensor & Camshaft 1) A respected Bosch garage carried out the work and checked all sensors which were all fine and fully working. However the light remained on (even after clearing the fault codes it returns after 2 start ups) It hasn't cause any problems and the car has done 7k faultless miles since. That said despite it running fine I am wondering if this will cause it to fail the MOT?

[CaptainSlow]

I had the same and mine has passed ok with it on for the last few years.

[mcford]

It's fine for this year, from 01/01/12 until 01/04/12 it'll be a compulsory advisory, thereafter a fail.

I've seen this fault on a couple of VW 1.8s after a timing belt change and in both cases the valve timing was incorrect.

[ST270]

mcford said:

It's fine for this year, from 01/01/12 until 01/04/12 it'll be a compulsory advisory, thereafter a fail.

I've seen this fault on a couple of VW 1.8s after a timing belt change and in both cases the valve timing was incorrect.

Thanks for the confirmation. Yes Valve timing would explain it I suppose - thing is it hasn't jumped a tooth on the chain and it runs without hesitation, flat spots etc so I'm wondering how to fix it really - the garage where the timing chain was fit couldn't pinpoint the fault aside from what the diagnostics were coming back with?