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What's It? Problem In My Ls400.


prosperopro

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It means your coolant (water) level is low, look at the plastic tank on the driver's side of the engine bay near the battery, there are 2 lines on it, the coolant should be a least up to the bottom line when the engine is cold.

If it is low top up with Toyota ready mixed antifreeze or a good quality long life one then keep an eye on it over the next few days, if it drops again look for leaks.

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ohh. I've also problem with heater. From ~600rpm to ~1,3krpm there isn't hot air. Could it be water pump?

A low coolant will do that also. Another thing might be a "vapor lock", air bubble, in the hoses to/from the heater core, often resulting from low coolant and persisting even after coolant is filled.

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Vapour lock is air trapped in the cooling system and normally occurs more in the top engine area.

Have a look at the link below, numbers 18 onwards may help you understand how to avoid vapour locks when refilling the coolant.

http://www.lexls.com/tutorials/cooling/coolant.html

The mirror and seat switches are not illuminated.

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