Hello all

I’ve got a 2011 RR Sport v6, which has a faulty fuel gauge.

When I first fill the tank, it will show the correct amount of fuel. Perhaps 20min into a drive (from cold), I get what looks like the brake warning light on the dash, amber ! in a circle with brackets. Then the fuel level randomly starts dropping, right down to zero. Sometimes it drops fast, sometimes slow. It may jump from say 112km of fuel remaining, to 20km instantly. If I switch the car off and on again, the level usually goes up a bit. When the car is warm after a drive, it seems to happen quite quickly.

My mechanics did the Landrover Technical Bulletin, dropping the tank, cleaning up the wires, and testing the fuel sender units (which appeared to be working). But if it’s an intermittent problem, perhaps a fault wouldn’t show necessarily.

Other weird things which have occurred around the same timing:

Bluetooth not connecting for mobile phone anymore. If I take the fuses out and reset, it will connect, but once the car has been turned off, next time it won’t connect.

Red Electric handbrake warning flashing on dash, and then won’t illuminate when I put the handbrake on. This has only happened a few times.

Radio signal cutting out intermittently.

I can’t operate the windows as I usually can once car shut off, before I’ve opened the door. Only happened a few times.

I feel like I’ve got some electrical gremlin in the car. I do feel it’s all possibly related.

Any ideas?

Thanks!

Hi,

Bad earth

if you want to read more about the fuel gauge there has been a number of threads about that (have a go with search function)
but you seem to have covered the first reason, sender unit wiring.

 Porsche Cayenne 2022
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!!

The TSB isn't for cleaning the connectors, it's for removing the connectors and hard wiring the sender units

Big difference, and we've never seen an issue other than the known corroded connectors