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Why Can't the Car Fuel Tank Cap Open?

2 Answers
Clara
07/29/25 10:29pm
The reasons why the car fuel tank cap cannot open are as follows: 1. The fuel tank cap may not pop open because it is stuck or rusted. Solution: This situation is relatively common. You can insert a small wooden piece into the gap of the fuel tank cap to pry it open. Remember to pull the fuel tank cap's latch switch while prying. 2. Nowadays, most vehicle fuel tank caps rely on a motor to lock. If the fuel tank cap cannot open, it is likely that the motor is damaged. Solution: Many vehicles have an emergency release for the fuel tank cap under the cover on the fuel tank cap side in the trunk. Pull the emergency handle with a little force while pressing the fuel tank cap to open it. 3. It may be that the fuel tank cap spring has lost its elasticity. Solution: Install a small spring at the protruding rubber pad of the fuel tank to increase the elasticity between the fuel tank cap and the locking device. 4. In cold weather, the fuel tank cap may not open because it is frozen due to the extreme cold. Solution: Pour hot water or forcibly pry it open.
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StCorey
08/15/25 11:20pm
I also encountered a situation where the fuel tank cap wouldn't open when refueling a few days ago - it was really frustrating. There are generally several common reasons: your car might not be fully unlocked, as many modern vehicles have fuel tank caps connected to the central locking system; or it could be mechanically stuck, which happens with rusty springs or excessive dust buildup; for electric fuel tank caps, it might be a blown fuse or faulty motor. Last time, I gently tapped the edge of the fuel tank cap with my car key and it suddenly popped open. By the way, frozen fuel nozzle openings can also cause jams in cold weather. If it really won't open, never force it - you might break the retaining clips, which would be much more expensive to repair.
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