Hello everyone,

 

I'm new to self repairing my 2010 Superb (Mk2/3T) and don't know which of these houses fuel level sensor 1.  Differences highlighted in red. Bottom of image is LHS and top is RHS of vehicle.

 

VCDS log:

 

2 Faults Found:
9453074 - Fuel Level Sensor 1 
          B103E 1B [008] - Resistance Too High
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 2
                    Reset counter: 201
                    Mileage: 37986 km
                    Date: 2101.14.14
                    Time: 16:38:58

9459995 - Covering for fuel level indicator sensor 1 
          B1059 1B [008] - Resistance Too High
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 85
                    Reset counter: 202
                    Mileage: 37849 km
                    Date: 2101.14.03
                    Time: 20:19:45

 

Thank you for your help!

Edited 24 June, 20196 yr by Lightbringer

Got my hands on a repair manual and it appears there are two fuel level sensors in each of those fuel tank cutouts called sender for fuel gauge display G (RHS) and fuel gauge sender 2 G169 (LHS). I can't believe the same company that came up with the idea to cripple the ABS system when any one of the four wheel sensor fails would simply go ahead and put 2 fuel gauge sensors for no apparent reason 😦

 

At least I have my answer now. Hope it helps someone in the same boat.

Is it 4x4?

8 hours ago, Tech1e said:

Is it 4x4?

 

Nope, FWD (2010 Mk2 Superb 1.8 TSI DSG)

Edited 25 June, 20196 yr by Lightbringer

Also something else I noticed just now, the fuel gauge works when I start the car and if its left idling but as soon as I drive for even a short distance it errors out and goes to empty. Has anyone had any similar experiences? A new fuel level sender costs 100+ euros so is there a simple fix? 🤔

There was a mod for the float clips week 30 2011.

issues with wiring harnesses to the fuel sensor week 22 2012.

and a few other things relating to defective function of the fuel gauge.

Fuel gauge sender 1 is known as G

Fuel gauge sender 2 is known as G169

So where the black connector and the feed and return pipes go is sender 1 or G.

Must have less than 3/4 tank to remove or fuel will spill out when undoing the ring.

 

Black pipe is feed

Blue pipe is return 

                     ⚠️  WARNING ⚠️ 

You can fit the black and blue pipes on the wrong unions and it will start and run until you go up a hill or accelerate hard, the pump won’t keep up with demand then. 

They look correct when they are on the wrong way round too.

Very common error after misfuel  draindown or any work on the sender unit.

Look for the arrow moulded into the housing which signifies feed or return, sometimes you may see a small black and blue dot next to the union.

Edited 28 June, 20196 yr by 3T51704x4

Thank you 3T51704X4.

 

Strange coincidences the way things work out. Although I had practically answered my own questions about my fuel sender problem following a drain down and refill after misfuelling. Also shows how those who think they are quite knowledgeable can fall foul of their own confidence.

After refilling with the correct fuel (diesel) and replacing the fuel pump/ sensor can this last week I have had fault code B103E12 intermittent and finding that switching off the ignition and then restarting the fault would clear. I was convinced that I had somehow disturbed the connections on the fuel sensor resistance track

by leaving the tank with petrol in it overnight before draining it and have ordered a new pump/ sensor unit.

Tonight I was musing through ebay and noticed the the used pump sender units that had just had the fuel lines cut through instead of disconnected when I realised I have put my fuel lines back on the wrong spigots. Sure the car ran fine until doing a hard right turn up a local hill ! 

I have rushed out to the car and repositioned the fuel lines. Have driven 25 miles without issue. The car even drives and feels far smoother. There are no stored fault codes. 

It would appear that mis placing the fuel lines on the pump unit allows the container the sensor sits in to get pumped dry or so low that the sensor track does not sit immersed in fuel which must affect the electrical resistance of the track hence B103E12 'Fuel sensor resistance too high'  

Someone may correct me if I'm wrong on that one but I don't mind being subject to howls of laughter even if I do have a B/TEC 1st in Motor Vehicle Engineering !.