having problems with a mk1 1600 focus .the door locks are intermittent .when they play up the car will not start , am assuming this is all connected had it all to bits last night the drivers lock is playing up so i found out am i on the right track, and are the door locks coded? or the same 2 door four door etc the young lady owner is losing patience help guys

 

Has she tried a spare key? Sounds like it could be the key at fault. When it doesn't start, what does the red light above the clock do? It should light up solid for a couple of seconds then go out, if it flashes quickly then that suggests an immobiliser problem.

 

not the key we know that for certain have scanned the car

 

I don't think the door locks are anything special, I assume when you say not working you have tried to unlock manually as well, or is that what you are trying?

Re the starting I strongly suspect this to be immobiliser related, which can be checked by doing the above.

Martin