Why do the car lights still work when the car is flooded?

1 Answers
BethanyLee
07/29/25 9:48am
This situation occurs because the wiring harness or a certain sensor has short-circuited or been corroded due to water ingress. You can use a computer diagnostic tool to read the fault codes and then check the connectors and sensors. If necessary, you can directly go to a repair shop or a 4S store for inspection and repair. Situations when a car is flooded: 1. Water entering the air filter: If the engine only mixes with water vapor and water enters from the air filter, the problem is not serious. Simply clean the water vapor from the air filter, throttle valve, and cylinder. 2. More water ingress: If the engine takes in more water but does not affect normal driving, although the noise is louder, it may be due to a small amount of water in the oil or gasoline. In this case, you need to change the oil and clean the related engine parts. 3. Engine water ingress: If a significant amount of water enters the engine, rather than just mixing with water, but the car has not been started and the engine is not damaged, you need to drain the water completely, clean the interior thoroughly, reassemble it, and replace the oil. 4. Unable to drive: The worst scenario is when the engine takes in a large amount of water and cannot operate after starting. At this point, the engine's cylinders, connecting rods, pistons, etc., may have deformed, indicating that the engine is already scrapped. You can only replace it with a new engine or scrap the car entirely.
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