Can a Car's ECU Still Work After Getting Wet?

1 Answers
Amber
07/29/25 9:56am
Whether a car's ECU can still function after getting wet depends on the duration of exposure, the extent of water ingress, and whether it was handled promptly. If the exposure was brief and the water ingress was minor, it may still be usable. However, for safety reasons, it is advisable to perform some basic treatments. Below are the recommended steps: Disconnect the Battery Immediately: Remove the negative terminal of the battery as soon as possible to prevent short circuits in the vehicle's electrical components due to water exposure. Inspect the Engine: Check the engine immediately, starting with whether water has entered the cylinders. Water in the cylinders can bend the connecting rods and damage the engine. Check the Engine Oil: Inspect whether water has mixed with the engine oil. Water in the oil can cause it to degrade, losing its lubricating properties and leading to excessive engine wear.
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