Hello all from Croatia.
I'm new to this forum, just read the whole thread since I'm experiencing the same issue on my Megane 2, 2008. 1,5 dCI 78kW. I know this is an old topic, but for me is a new one
The problem with "injection fault" happens only when the car is on the working temperature and I try to start it up. For example, when the engine is cold, the car starts nicely with no problems (every time), and when I drove it for 30 minutes, switch it of and for 2-3 minutes try to start it again. Then the car starts, runs for 5-10 seconds and then it turns off. And after 5-6 on and off again it starts and everything is normal you can go for miles. Never shoved this error or turned off during driving, only on a warm start.
I changed 3 mechanics with no luck fixing the problem. We changed battery and voltage regulator, and they checked glow plugs, injectors are fine, cylinder pressure is fine.
I bought a newer version (Megane Grandtour 1,5 dCI 110 HP, year 2015.) and I want to sell the old one, but I want to fix it before selling.
I suppose ECU is fine because on a cold start and during driving everything works normally.
I'm going to change the fuel filter just to be sure (I think that currently it's not original part).
Any thoughts what can be? Did someone had similar problems with warm start?
Thanks in advance.