i have a fuel leak on my 306 hdi and know its because the in-tank fuel pump has been inserted wrongly, crossthreading the tank. i also have a warning light on my dashboard - the auto-diagnostics light. the manual says this indicates a problem with the furl injection system.would the fuel fuel leak caused by the incorrectly situated lift pump make this warning light appear. the car still runs ok (although leaking).
I do think that incorrectly installing the fuel pump can cause that problem because then it would be sucking in air and also leaking fuel, and if there is any problem with a vehicle there are always idiot lights or as people know them as warning lights. so yes i do think that could cause the problem.
The light says that you are leaking fuel into the atmosphere rather than burning it. Usually this happens when a personfills the car with the engine running or leaves the gas cap loose. In your case, there may be a fuel injection problem, but I will bet that this bad fuel pump installation would cause the light to come on.
