Fuel gauge... always zero

[xplod55]

Hi guys..
I am facing a problem with the fuel gauge which had suddenly went to the zero position and light on, and remained there, although I refueled more than once.

Any advice would be appreciated:thanks:

[mahmoud_bedewi]

one of the fuel level senders (float) is gone u need to remove the rear seat cushion to access the fuel tanks and the sender units and do some resistance measurement

[Moe]

i had the same issue in my e46 330, its either wut mahmoud mentioned, or the gauge it self...

[Shak]

Simple test you can do with your onboard diagnostics to check the fuel level in both sides of the tanks before you start to remove sender units!

Instructions to access the hidden OBC functions:


Hold Trip Reset while turning ignition key to on position
OBC should show "Test"
Use Trip Reset to select function 19.0 that unlocks all the features
Wait for display to show "Off"
Depress Trip Reset for 1/4 second and release it
With no delay press Trip Reset several times to select one of the following functions

First try to reset the cluster by using function 21 if this fails go to function 6 to 6.1 this will tell you wich sender unit is faulty,they should both read equal amounts of fuel.

Also try 2 (test) Cluster System Test - Activates the gauge drivers,
indicators and LEDs to confirm function

BMW Exx On-Board Computer (OBC) Hidden Codes
nr example description
1 Car Engine and cluster data
1.0 46nnn Chassis nr/VIN serial number (last 5 digits)
1.1 4nnn K-numbery
1.2 690236 Cluster Part #
1.3 045210 Coding (04)/diagnosis (52)/bus index (10)
1.4 1200 Week (12)/year of manufacture (2000)
1.5 09_160 Hardware (09) and software # (16.0) of cluster
1.6 Not used
1.7 04__44 CAN-version (04) KI-revision index (44)
2 (test) Cluster System Test - Activates the gauge drivers,
indicators and LEDs to confirm function3 SI Data
3.0 1098 Used fuel in liters since last SI (Service Inspection)
3.1 0231 Periodic inspection days; elapsed days (since last SI)
4 Momentary Consumption
4.0 0145+ Instant fuel consumption - 0145=14.5 liters/100km
4.1 0018 Instant fuel consumption - 0018=1.8 l/Hour
5 Distance Gone Consumption
5.0 082 Average mileage; 082=8.2 liters/100km
5.1 0536 Calc. km to refuel (momentary distance to go)
6 Fuel Level sensor inputs in liters
6.0 109330+ Fuel level averaged; Left half sensor input=10.9 liters; Right sensor input=10.9 liters
6.1 0439+ Total tank level averaged; vlgs 6.0: 10.9+10.9=21.8 liters
6.2 0442+ Indicated value (21.8) and tank phase
7 Temperature and Speed
7.0 021+ Coolant/Engine temperature (2.1C)
7.1 130 Ambient/Outside temperature - chg met 5 pts. 125/130/135
7.2 + Engine speed / Current RPMs 1/min
7.3 + Vehicle speed / Current Speed in km/hour
8 Input value in HEX form
8.0 1d0+ System voltage ADC-Value Hex code
8.1 26C33C+ ADC Values HG left/HG right
8.2 0000 ADC Value brake degradation sensor (000=o.k.)
8.3 18C ADC Value outside temperature
9 Battery
9.0 140 Battery Voltage - 140 = UB 14.0v
9.1 242013+?
9.2 074_78+?
9.3 0011+?
10 Not used
11 Not used
12 Not used
13 GonG Gong Test
14 Not used
15 Status cluster I/O-ports (bit codes) 0=low; 1=high
1st-belt contact, seat belt fastened=0; 2) ignition lock contact, key inserted=0; 3) door contact, door open=0; 4) clock button pressed=0; 5) SI reset=0, for reset=0; 6) EGS transmission failure=0
Status Digital Outputs (bits) 0=inactive, 1=active
1) Gong output; 2) Brake warning lamp; 3) Low fuel warning lamp; 4) EGA lamp; 5) seat belt lamp; 6) manipulation dot
16 Not used
17 Not used
18 Not used
19 Lock Status; unlocks functions in range 3-18
19.0 L-On/L-Off Unlock: press button when "L-Off"
20 Not used
21 Software Reset; reset OBC settings
00 End of test

Hope this helps

just like me when i was in Turkey

but it was my pocket not the fuel tank which is empty... because of the fuel prices :D:D:D

[xplod55]

thanks to everyone...
Mahmoud when are you coming back here??
Shak, this is lots of valuable information, but is this for e36?? As I have tried it and nothing happened.

[mahmoud_bedewi]

i am already in Abu Dhabi :D i came here just a few days back

[xplod55]

welcome bak ya rayyes we alf mabrook 3al kas

[mahmoud_bedewi]

mabrook to you as well :)