Faulty fuel gauge reading!!!

Talk about the 406's electrical system, what wires do what, how to add extra functionality, etc.

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WelshHDi
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Faulty fuel gauge reading!!!

Post by WelshHDi »

Hi,

Problem i have guys, is that i have just jumped in my HDi this morning, (2.2 HDi 2001) and for some reason the gauge has jumped to 3/4 full when i know for a fact that it is just below full!!! Can someone give a rough indication of where i can find the sensor for this, or possible what the route of the problem could be???

Thanks in advance!!! :?
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puggy
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Post by puggy »

think the sender is in the fuel tank... have had a similar
thing on mine ... looked at gauge after a run turned it off
and later when started did not go back to original place..
just took it that it was catching up...
.. ooh are those drugs for me Matron
WelshHDi
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Post by WelshHDi »

The problem with mine is that it is showing a reading a lot higher than what it is.
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Welly
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Post by Welly »

WelshHDi wrote:for some reason the gauge has jumped to 3/4 full when i know for a fact that it is just below full!!!
WelshHDi then wrote:The problem with mine is that it is showing a reading a lot higher than what it is.
Make your mind up man :lol: :lol:

The sender unit is part and parcel of the lift pump in the tank which is not a very nice job to get at. I don't believe it's entirely possible to replace through the cover plate under the back seat but someone here might know better?

It might just be worth a quick looky at the wires coming out of this unit under the seat to make sure they're all ok and plugged in nicely.
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puggy
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Post by puggy »

its just possible welly ... but in a brutal sort of way :cry:
.. ooh are those drugs for me Matron
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Welly
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Post by Welly »

I remember someone on here got stuck trying to get the pump out of the stupid hole under the seat and ended up having to drop the eggsauce and the tank :x
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jameslxdt
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Post by jameslxdt »

are you sure you wasnt parked on a steep slope, where i park outside my house is at quite and angle and if park facing one way i have lots more fuel than i should and so forth
but welly is correct the fuel pump is integral with the sender so really aint worth changing till the pump fails
Peugeot wrote:what are you worried about? we made car that lasted 10 years"..."Zat is very goode non? :|
FAQ - 406 D8 petrol (excl. V6) running and starting problems
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neildavies
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Post by neildavies »

My 2.2 HDi has done the same as yours a couple of times (twice in fact). The first time, I had half a tank, parked on my brother's steep drive, when I reversed off and drove away, the gauge was stuck on 3/4. Another time, it stuck on half.

On both occaisions, filling the tank above the level that the gaue is stuck on solved the problem.

Both occaisions, I used Tesco diesel, not my usual esso. I don't know if the extra cleaning agent is cleaning the lubrication from the gauge.
2007 Mondeo Titanium X 2.0 TDCi
2007 307cc Sport 2.0 HDi 136
Gone but never forgotten: 2002 406 Coupe SE 2.2 HDi
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mjb
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Post by mjb »

jameslxdt wrote:are you sure you wasnt parked on a steep slope, where i park outside my house is at quite and angle and if park facing one way i have lots more fuel than i should and so forth
Aye. My tank level meter thingy is located in the front of the tank so reads low to the tune of about 1/5 tank when the car's pointed uphill and high when pointing downhill. It's a pain because it'll mask a days worth of fuel
<steve_earwig> I think this forum is more about keeping our cars going with minimal outlay than giving our cars more reason to go bang
WelshHDi
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Post by WelshHDi »

Chaps,

Would just like to say thank you for the advice!!!

Went for the easy option that was suggested first, filled the tank back up to full, and hey, it seems to be working again!!!

Just the old fauthfull "Antipollution" message to deal with again!!!

Love my 406 to bits, but what is it with these cars and electrics??????
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jameslxdt
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Post by jameslxdt »

its french what do you expect :lol:
Peugeot wrote:what are you worried about? we made car that lasted 10 years"..."Zat is very goode non? :|
FAQ - 406 D8 petrol (excl. V6) running and starting problems
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neildavies
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Post by neildavies »

jameslxdt wrote:its french what do you expect :lol:
To be fair, that sums up a lot of the problem on these cars...
2007 Mondeo Titanium X 2.0 TDCi
2007 307cc Sport 2.0 HDi 136
Gone but never forgotten: 2002 406 Coupe SE 2.2 HDi
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mjb
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Post by mjb »

neildavies wrote:
jameslxdt wrote:its french what do you expect :lol:
To be fair, that sums up a lot of the problem on these cars...
and a lot of painfully difficult solutions to simple problems... ;)
<steve_earwig> I think this forum is more about keeping our cars going with minimal outlay than giving our cars more reason to go bang
muffindell
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Fuel level

Post by muffindell »

Filled the car up today, fuel light was lit and needle was just dropping onto the red. However I managed to get 71litres of diesel into the car befor cut off, so whats going on there? I always thought the tank was 70lts, taking into account the needle reading it should of taken around 65lts - any ideas?
mbell666
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Post by mbell666 »

I've put nearley 75 into mine before. I think the filler pipe holds quite a lot and the tank is slightly bigger than stated!
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