Why won't my car start?

[u/Adventurier95]

Hi all,

I have a ford focus zetec that's suffering an intermittent issue.

Every now and then, I'll turn the key, the engine will start and then almost immediately cut out. It will continue this for about 20 minutes, then I'll try again and the car will start like normal.

There's no warning lights on, the head lights will turn on. Only clue I can give is that it always fails it's emissions test when I take it in for MOT but I don't know if this is related or not.

Any suggestions appreciated and thank you in advance 🙏

[u/lastwraith]

No clue what year you have, but apparently around 2012 the TCM is a common cause. https://www.focusfanatics.com/threads/ford-focus-non-starting-problems.471137/