Temperature warning light and buzzer coming on in 2016 Holden Barina RS
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Asked by Deb
The temperature warning light/buzzer in my 2016 Holden Barina RS keep coming on while driving around. All levels seem to be ok, and has been seen to by our mechanic who couldn't diagnose the problem. Help!
Answered by CarsGuide
17 Jan 2024The first thing to determine is whether the engine is actually getting hot. You need to find a mechanic who can tell the difference between a genuinely hot engine and one that is crying wolf. Most times, this will involve letting the engine idle until the warning light comes on and then checking the actual temperature of the coolant. This is usually done via a trusted thermometer (infra-red thermometers are great for this) checking the temperature of the coolant in the radiator's top tank.
If the engine really is hot, then you're looking for a mechanical problem. But if the temperature is within a normal range, then you need to start looking for a dud temperature sensor, faulty gauge/light or a problem with the car's wiring. This can be a lot harder to find than you might think, but driving around with a temperature warning flashing is no good either.
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