Many many thanks to trevstamf to share your vary valuable experience. I owned this Laguna II 1.6 16V Expression 2002since 4 month ago, recently had exactly the same problem. My car is runing on LPG but this problem can come whether it is on petrol or LPG. It used to happen once a week, after driving for a while, stop to do some shopping, when come back, the "electrical fault" light went on and run into limp mode. From time to time it also happens during driving after a short break. Last week it started happening everyday. Sometimes a restart will solve the problem sometimes not.
After searching in the forum I also suspected the
can be faulty. Last month after a long trip to France I had the car fully serviced and new igination
, new sparks fitted. The guy in the garage told me the
is working fine.
As an electronics engineer, my instinct told me it could most be a contacting problem somewhere. But I do not have any clue where to start with. Thanks to trevstamf's post. The day before yesterday I open my car for the first time by myself. I removed the battery, the sensor box and cleaned everything, reconnected doggy wires (I have many extra wire and some extra boxes for the LPG part). But I have not touched the
part. As far as I can see, the
is sealed in an metal box. It is covered by a piece of metal that I can not remove. I am thinking to buy a Haynes manual before proceed. I will try to make some pictures next time.
My Laguna was running quite ok for the last two day, but it is a bit too early to be happy.