1. Faulty fuel sending unit: The fuel sending unit is a sensor located inside the fuel tank that measures the amount of fuel in the tank. If the sending unit is faulty, it can send an incorrect signal to the gas gauge, causing it to read "half full" even when the tank is not full.
2. Electrical problems: A faulty wiring connection or a damaged electrical component in the fuel gauge circuit can also cause the gas gauge to read incorrectly.
3. Computer problems: The gas gauge in your Caravan is controlled by the vehicle's computer. If there is a problem with the computer, it can send an incorrect signal to the gas gauge.
4. Sticking float arm: The float arm inside the fuel tank is attached to the fuel sending unit. If the float arm is stuck or damaged, it can prevent the sending unit from moving correctly, causing the gas gauge to read "half full" even when the tank is not full.
5. Clogged fuel filter: A clogged fuel filter can restrict the flow of fuel to the engine, which can cause the fuel gauge to read incorrectly.
6. Bad gas cap: A loose or damaged gas cap can allow fuel vapors to escape from the fuel tank, which can cause the fuel gauge to read incorrectly.
If you're experiencing this issue, it's important to have your Caravan diagnosed by a qualified mechanic to determine the cause of the problem and get it repaired.
