Discovery 4 fuel gauge problems

Bought a 2010 Disco 4 and thus started my tales of woe and expense..
The latest issue is fuel gauge with erratic readings..! To date 2 garages have had a go each day one telling me it’s fixed and s far to the tune of £1200 and the issue remains…
Does anyone have any suggestions, I hear the BCM could be an issue, do s you his have Amy control over h gauge readings…??
Thanks for any advice..
Baz

Was one of both fuel level sensors replaced at a point for those £1200? anyway, seems a quite complicated issue, here's what the WSM states for that symptom on a D4:

Thanks but that means diddley squat to me , I’ll pass onto the garage..

Baz 1960 said:

Bought a 2010 Disco 4 and thus started my tales of woe and expense..
The latest issue is fuel gauge with erratic readings..! To date 2 garages have had a go each day one telling me it’s fixed and s far to the tune of £1200 and the issue remains…
Does anyone have any suggestions, I hear the BCM could be an issue, do s you his have Amy control over h gauge readings…??
Thanks for any advice..
Baz

Click to expand...

Used to be a common thing where rodents had got onto the top of the tank and eaten the wiring.

Presumably a £1200 repair would be from an LR dealer, so all the calibrations and tests would have been done.
If it wasn't an LR dealer, then it's possible that the job wasn't done correctly. Unfortunately on a modern vehicle, you can't just fit replacement parts, as they need calibration with the correct equipment.

Indeed might be the cluster as they can suffer with dry soldering joints, get them to double check that whilst hooked up to an oscilloscope

along with the rear near side connectors that sit on the chassis frame

Fingers crossed get it resolved as blimey £1200 and still having the issue, indeed sounds like a new garage is req

Well to close this expensive chapter, two garages couldn’t sort it, it’s now gone to we buy any car. 2010 Disco 4 for the princely dime of £4500, that 10k lost in 18mths plus repairs

Should have sold it privately for much more than the trade in price.

Not with the amount of other things wrong with it…!

Re the fuel gauge.

I just finished another 2012 TDV6. Body off - Engine rebuild.

Started perfectly, ran smooth, getting up to temp, cough - splutter - cough - die.
Started immediately, ran fine for about a minute then cough - splutter - die.
Same again, then again, hmmmm ? Ah, fuel low - gauge reading MT.
I do a pump delivery test and it is fine ?
I try to clear all the codes, some clear others don't repeat - same, oh well, I will deal with that later.

I nurse it to the petrol station, put £40 in and same, cough -splutter die - repeat.
I notice the dash is still saying fuel low ? Hmmmmmmmmm ?
I drive it home, and clear the faults, same, I have a lot of "lost comms" faults and I notice the parking brake isn't working.

Get it back on the ramp, take the N/S/R wheel off to look at the multi plug, I separate, check, put it back together and get back in the car, I put the hand brake on and I hear the whirling of the gear and the brake is now on, Oh shoot, I have nearly 3/4 tank of juice, and it isn't coughing or cutting out any more.

I quick blast round the long block ( 7 miles ) and she is perfect.

I have had a similar issue before with this plug but on a D3 the D3 has two plugs, so I had clue where to look, I went in to tell the wife that I had fixed it, she asked, and I tried to explain that the hand brake was not working so I checked the plug and now the fuel gauge is fine. You might want to tell your wife something different because my wife isn't having any of it.

Hope this helps.