Tank indicator faulty. Has the cable become detached from the fuel module?
Can you hear a loud hissing noise when opening the fuel tank cap?
The problem may be in the fuel tank ventilation system.
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00:00 Problem: Loose sender unit cable
00:21 Fuel delivery module design
00:44 Damage symptoms
01:25 Sources of fault in fuel tank ventilation system
If there is a problem with the fuel tank ventilation system, a strong vacuum can develop inside the fuel tank, causing it to start collapsing in on itself.
The fuel delivery module comprises a flange cover and the reservoir with the sender unit and fuel pump. Thanks to this two-part construction, the fuel delivery module can compensate for changes in the size of the fuel tank up to a certain degree.
The fuel delivery module can compensate for changes to fuel tank size.
However, if the vacuum becomes too strong during cold weather, for example, and the fuel tank shrinks too much, the sender unit's cables can become detached.
Typical damage symptoms: the sender unit's cable is detached and the electrical contacts are bent.
Possible causes of faults in the fuel tank ventilation system may be:
Defective solenoid valves
Blocked activated carbon canister
Blocked venting valve in the fuel tank cap
Bent or blocked connections
Read more here: https://www.ms-motorservice.com/en/te...