What is the reason why the Envision cannot start after water ingress?
2 Answers
The reason why the car cannot start after water ingress is due to the water. Methods to check if the engine has water ingress: Check the engine oil. Inspect various pipelines for water ingress. Check the spark plugs. Examine the engine cylinder walls for carbon deposit traces. Post-water ingress handling methods: If the vehicle only went through water once and the engine was not started afterward, this generally does not cause irreversible damage to the engine. The main task is to clean the internal water accumulation in the engine, but the extent of cleaning should be considered based on the situation. More often, the intake pipe and intake manifold are removed, and compressed air is used to dry the water inside. If the car stalled in the water, most would recommend authorized disassembly of the engine.
Oh dear, I've encountered this issue many times when the Envision won't start after water exposure. Flood-damaged vehicles most commonly experience electrical system failures, such as short circuits in wiring or wet sensors. The computer locks the starting circuit immediately upon detecting abnormalities to prevent further damage from improper operation. If there's water accumulation in the engine, the pistons can't move, the ignition system gets damp and the spark plugs won't fire, and the fuel injection might clog the intake pipe. Fuses often blow too, especially if the waterproof seals underneath aren't properly maintained—the Envision's low chassis makes it more vulnerable. I recommend you stop attempting to start it forcefully. First, disconnect the battery terminals to cut power, then call a tow truck to take it to a professional shop. They can use diagnostic tools to check the ECU and various sensor statuses, then clean or replace faulty components to fix the issue. For prevention, always try to park on higher ground and inspect door seal strips before the rainy season—these small details can prevent big problems.
