Originally Posted by
traineetech
Thanks for the advice but was actually looking for somewhere to start! Any kerbside mechanic can change parts to see if it cures the problem but as I'm currently studying level 2 mechanics a bit more in depth advice would be helpful.
The problem is that it could be any number of things - and even an expert mechanic will be unable to diagnose it properly without the correct equipment.
If you want you can do a leak off test - but ultimately, unless you're lucky and find the fault by swapping parts you'll need the services of an expert.
Have a look at talkford.com at the number of people who have those fault codes - There are LOTS of different solutions.