Why does the fuel gauge indicator light stay on after filling up the car with gas?

1 Answers
VonKaleb
07/29/25 11:39pm
After filling up the fuel tank, the fuel tank float rises so high that the contacts and sliding piece of the fuel level sensor cannot reach the edge position, sometimes even disconnecting. This results in a high resistance, similar to the situation when the fuel is low, causing the fuel warning light to activate and stay on. The fuel gauge indicator light staying on is caused by the following reasons: 1. Fuel level sensor malfunction: The fuel level sensor detects the position (height) of fuel in the container by measuring the change in capacitance between the sensor casing and the sensing electrode when fuel enters, converting this change into a current change. If possible, you can replace the fuel level sensor at a repair shop. 2. Wiring fault: When there is a short circuit or open circuit in the wiring, the information from the fuel level sensor cannot be read, resulting in the indicator light staying on.
Was this review help?
6
0
Share
More Forum Discussions

What model of spark plugs should be used for the Elantra?

The spark plug models suitable for the Elantra are RC10YC4, NGK6809, or NGK5787. The function of a spark plug is to discharge the high-voltage pulse electricity delivered by the ignition coil, breaking down the air between the two electrodes to generate an electric spark, thereby igniting the air-fuel mixture in the cylinder. The Elantra is a compact car introduced by Beijing Hyundai Motor Company. Its exterior dimensions are 4542 mm in length, 1775 mm in width, and 1490 mm in height, with a fuel tank capacity of 52 liters, a trunk capacity of 475 liters, and a curb weight of 1236 kg. The Elantra is equipped with a 1.6L naturally aspirated engine, delivering a maximum power of 90.4 kW at 6300 rpm and a maximum torque of 155 Nm at 4200 rpm.
9
5
Share

Reasons for the Ticking Sound in Audi A4 Engine

Audi A4 engine has a ticking sound, and the following aspects need to be checked: 1. Many new car owners, after completing their first warranty inspection service, may suspect abnormal engine noise when opening the front cover during idle (because before the maintenance, they were operating inside the car's cabin and couldn't hear the normal ticking sound of the engine under the front cover. Now, hearing this sound is due to the idle state and opening the front cover specifically to listen to the engine noise, naturally hearing the normal operating sound of the engine.) If this sound is not heard inside the car, it's generally not a big issue, usually the sound from the valve or fuel injector. The carbon canister solenoid valve also produces this sound, but it's crisper. One way to distinguish is to slightly press the accelerator during idle and see if the frequency changes. If the frequency doesn't change, it's the solenoid valve sound; if it changes, it's likely the valve noise. If it's still unclear inside the car, it's not a big problem. Vehicles generally have corresponding ticking sounds, one from the fuel injector working, another from the valve area, and a similar sound from the timing chain, but that differs from the ticking sound, having a rattling noise. 2. Generally, when a car starts cold, the engine sound is slightly louder than when it's warm. As long as the sound is uniform and soft, not harsh, it's usually fine. This is because when the engine is cold, the gap between the cylinder wall and piston hasn't reached the optimal size, and the oil lubrication isn't sufficient. Usually, when the engine block temperature reaches about 95 degrees, the sound returns to normal. 3. Oil-related reasons. Poor-quality oil, not changing the oil for a long time, or lack of oil can easily increase friction between the valve and guide, hydraulic lifter, etc., making various engine sounds louder. 4. If still unsure after the above checks, it's recommended to visit the nearest 4S or repair shop for inspection to confirm the fault cause.
11
5
Share

Should Roewe use 92 or 95 octane gasoline?

Roewe recommends using gasoline with an octane rating of 92 or above, so generally using 92 octane gasoline is sufficient. Below is an extended introduction: Recommended octane rating and above: Use automotive gasoline that complies with national mandatory standards and the recommended octane rating. Using lower octane fuel may cause severe damage to the engine and catalytic converter, reduce engine power and torque, and increase fuel consumption. If lower octane gasoline is used, engine knocking noises may be heard, so it is advised to switch to the recommended octane rating or higher as soon as possible. Use gasoline suitable for the compression ratio: For vehicles with high compression ratios, using lower octane fuel not only damages the vehicle but also increases fuel consumption. Conversely, using higher octane gasoline in vehicles with lower compression ratios not only wastes money but also leads to slower ignition, prolonged combustion time, reduced power, and even damage to the exhaust manifold. Only by using gasoline that matches the vehicle's compression ratio can engine power be improved, driving range increased, and fuel consumption reduced.
17
3
Share

Harley Glide Throttle Not Responding?

Transmission oil deficiency symptoms are as follows: Transmission noise will significantly increase: If there is a lack of oil, the transmission noise will become noticeably louder, especially when driving at high speeds, which can affect driving comfort. Additionally, without the lubricating effect of transmission oil, the jerky feeling during gear shifts will increase significantly. In severe cases, it can also lead to a rise in the internal temperature of the transmission (cooling effect), potentially causing damage to internal transmission components. Jerky feeling during gear shifts will increase: Without the lubricating effect of transmission oil, the jerky feeling during gear shifts will become much more pronounced, and driving in winter becomes even more uncomfortable when shifting gears. In severe cases, it can also cause the internal temperature of the transmission to rise (cooling effect), likely damaging internal transmission components and requiring repairs. Another important point to note is the replacement interval for transmission oil.
2
4
Share

Can I continue to use the rear shock absorber if it's leaking oil?

Whether to replace a leaking shock absorber depends on testing its performance. Slight oil seepage: Slight oil seepage manifests as a small amount of oil stains on the shock absorber, but it does not affect the vehicle's comfort and is no different from a normal shock absorber. This type of seepage can be ignored for the time being, but the leakage should be monitored frequently. More severe oil leakage: More severe oil leakage refers to a large amount of oil sludge on the shock absorber. Leaking oil will deteriorate the vehicle's shock absorption effect, seriously affecting driving comfort. On bumpy roads, it may sometimes be accompanied by a "squeaking" noise. Moreover, if the leakage is particularly severe and the shock absorber fails, it can also cause the vehicle to pull to one side.
5
3
Share

Can Tubeless Tires Only Be Sealed Once?

Tubeless tires can be sealed with puncture repair adhesive a second time. However, if the puncture is relatively large, it is recommended to use a plug, perform an internal patch, or replace the tire. Below is relevant information about tubeless tire repair: Tubeless Tire Plug Repair: This form of tubeless tire repair requires grinding and enlarging the tire wound to some extent, and its reliability is relatively poorer. Plug repair can only serve as a temporary emergency tire repair method and is not recommended for long-term use. If time permits, it should be replaced with a patch or mushroom plug repair as soon as possible for better actual results and safer driving. Repair Methods: There are various methods for repairing tubeless tires, including adding sealant, plugging, internal patching, etc. Plugging is the simplest tire repair method, which can quickly address issues like tubeless tires being punctured by nails, serving as an emergency repair method. Compared to adding sealant, plugging is more reliable because sealant has a certain degree of corrosiveness. Frequent use can corrode the wheel hub, and it also has a limited effective period, becoming ineffective over time.
8
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.