I have had an ongoing problem with my 200 Boxster S concerning the fuel gauge. It reads "empty" (with the low fuel light on) continually no matter how much fuel is in the tank. The dealer has not been successful in fixing this issue. They replaced the sending unit, recalibrated the gauge at least three time, with the problem always returning within a week or so. An ideas?

 

A little piece of black tape over the light .

Sorry. After noticing 3 threads, all related to electrical issues, something "big" must be failing. Sorry I can't help.

 

if it has been charging you for its work.

The dealer is supposed to offer reasonable skill and knowledege about the vehicle. I can't recall the legal wording but you get the idea. If you took the car to the local lawnmower shop well, one should not be surprised if the shop's unsuccessful in fixing the problem.

But taking the car to an official Porsche dealership, with all its skilled, trained technicians, the car shouldn't leave with the problem unresolved.

The dealer can't simply replace the car a piece at a time until it stumbles upon the cause of the problem, though it will as long as you don't object.

Given what has been tried, assuming no screw ups in replacing the sending unit and recalibrating the unit, the problem probably lies within the wiring.

I don't know the history of the car, but if the car has had an aftermarket stereo system or alarm system, nav system, any eletronic gizmo installed then the installation becomes suspect, even if the installation was done some time ago.

Improper routing of the wiri ng, a pinched wiring harness, can account for the symptom.

Another is a windshield leak that allows water to get down into the dash area. Water can take a very circuitous route from where it enters the vehicle to where it makes itself known by the symptom(s) it creates.

Yet another possible cause is rodent damage to the wiring harness.

Very close examination of the wiring from the sending unit to the dash and bulb needs to be done looking for any wiring damage, abrasion, gnawing (or any signs of rodent presence). However, this kind of examination can be expensive.

Electrical problems are usually the worst kind of problems to trouble-shoot in a car and one of the reasons is the harness is almost always buried inside the car and in hard to get to and see places.

Sincerely,

Macster.