Can Low Coolant Cause Check Engine Light?

A deficiency in coolant in your radiator car could trigger the malfunction light light (MIL) that is also commonly referred to in”the “check engine light. The low coolant could alter an engine’s temperature, but it is then protected by antifreeze. When the coolant’s level isn’t sufficient to ensure the internal heat of an engine, the engine coolant. There’s a chance that the coolant temperature sensors (ECT) gives the Powertrain Control Module a false reading (PCM).After the PCM detects an error in the cooling system, the ECT does not transmit the voltage signal required from the PCM and it activates”check engine” light “check engine” light.

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The sensor for temperature control is used to regulate the interior temperature in the combustion engine. It is first introduced with OBD (on-board diagnostic) as well as OBD II (vehicles manufactured from 1996 and onwards) The sensor is encased within the coolant system in order to check the level of protection for coolant. A low level of coolant won’t provide sufficient temperature protection to regulate the internal temperature. This means that the ECT sensor could be damaged.

If you add coolant it will work, but there’s no guarantee that damage hasn’t occurred to or both the ECT sensor , or to the thermostat. Add a layer of the appropriate antifreeze, and then see what happens. It could take several hours at normal operating temperatures to allow the ECT to connect to the PCM and to reset the MIL. In the event that you notice that the “check engine” light doesn’t change, further diagnostics will be needed to determine what should be replaced. In many instances when it is determined that the ECT sensor fails then it will light up the “check cooling” light will light up–if appropriate to the particular vehicle in conjunction with the MIL.

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