Fuel Level Sensor Failure

[BigBadBen]

Hi Loren,

For the past 3 months when I get to about 1/4 of gas the gauge will drop to empty and the following error is displayed "Level Sensor Failure". What PN do I need to fix this problem please. Is there anything else that could cause this and is this a common DIY.

TIA

Ben

[Loren]

Have you ever had the fuel tank, fuel level sensor or instrument cluster replaced? If so, it sounds like they did not calibrate your fuel level sensor.

If none of those have been replaced then you could have a bad wiring connection (fuel sensor to instrument cluster), a bad fuel sensor, or a bad cluster.

The fuels sensor is with the fuel pump in the tank - so even inspection will be a pain. To calibrate the fuels sensor they need to empty the gas tank, fill it with an exact amount of fuel (28 liters) and then use a PST2 or PIWIS to set the calibration.

[BigBadBen]

Loren,

I have the EVOMS GT700 kit on my car. I upgraded the fuel lines etc for this kit with much larger injectors but I have not touched the tank itself or cluster.

Ben

Have you ever had the fuel tank, fuel level sensor or instrument cluster replaced? If so, it sounds like they did not calibrate your fuel level sensor.

If none of those have been replaced then you could have a bad wiring connection (fuel sensor to instrument cluster), a bad fuel sensor, or a bad cluster.

The fuels sensor is with the fuel pump in the tank - so even inspection will be a pain. To calibrate the fuels sensor they need to empty the gas tank, fill it with an exact amount of fuel (28 liters) and then use a PST2 or PIWIS to set the calibration.

[Loren]

I think a re-calibration might be the first thing I would try - especially since it is so consistent.

[JonasGranlund]

I have this exact same problem.

When I fill the tank it says 3/4 full and when the light comes on I have +20L left.

This problem just came one day after I connected/disconnected my battery.

Could it have been cause I had to little gas in the tank during my disconnection so it couldnt calibrate afterwards?

Regards

Jonas

[Loren]

Jonas,

Have a look at Carrera TSB 2005 Carrera 4 – Running Out of Fuel. I think this same principle applies to TT since it has the same fuel tank configuration (due to 4 wheel drive).

[JonasGranlund]

Hello Loren!

THanks alot for the help, I think I tried to disconnect and connect the battery with full tank afterwards but Im not sure, I try it again and come back with info :)

[BigBadBen]

I would be very interested to know if this fixes the problem, I have reset my DME about 15 times in the last year due to MAF issues and my GT700 kit.

TIA

Ben

Hello Loren!

THanks alot for the help, I think I tried to disconnect and connect the battery with full tank afterwards but Im not sure, I try it again and come back with info :)

[JonasGranlund]

Ben!

Then you might have had to little fuel one of the times wich caused the error?

I think I need to calibrate the sensor at Porsche but ill try to fill it up one more time and disconnect the battery for 15 minutes or so :)

Jonas

[BigBadBen]

Keep me posted Jonas..cheers,

ben

Ben!

Then you might have had to little fuel one of the times wich caused the error?

I think I need to calibrate the sensor at Porsche but ill try to fill it up one more time and disconnect the battery for 15 minutes or so :)

Jonas

[slant911]

Jonas,

Did that fix the fuel level issue? Curious as I have had a dodgy fuel guage and had the fuel level sender replaced and still problems persist.

TIA