![]() These are some of the possible causes of a coolant light going on when the tank is full. ![]() Check the wiring to be sure nothing is loose or corroded. Your problem also be a faulty coolant level module. ![]() Also watch below your car for any telltale drips. That may be an indication of a leak that you haven’t seen yet. While you drive, take note if you smell coolant. You may not notice the difference at first, thinking that your tank is fullĪ repair to a cracked engine block or head gasket is an expensive repair. When you get a crack in the block or the intake gasket you will leak coolant and oil, usually slowly at first. Your coolant light might be signs of a more major engine problem. If you recently had your thermostat replaced, check to see that it was replaced with the correct temperature range. Your thermostat may be stuck open and causing improper readings. You may have some sensor problems that stem from the thermostat rather than the sensor. Replacing a sensor that is starting to show extreme signs of age and wear can prevent future problems. It is not a bad idea to keep an eye on your sensor’s readings. If your car is older, the sensor has deteriorated with time and may be failing but not entirely failed. More often than not, though, you will need to take voltage and resistance readings from the sensor to see if it is functioning properly. In this case, removal and replacement is necessary. You will be able to see if it is cracked or badly corroded. Visual diagnoses can sometimes detect a problem with the sensor. Have all of your connections checked to see if this may be the source of your problem. It is likely that the problem may be a loose, corroded, or faulty connection and not a problem with the sensor itself. A bad coolant sensor may cause a decrease in fuel efficiency or it may also cause the vehicle to fail your emissions inspection. This is common with Audis and VW cars.Your sensor may fail or it may simply give a bad reading. If you turn the car off and on and the message goes away. Sometimes there is nothing wrong with your Audi cooling system and the check coolant level message can be caused by a false alarm. Wrong Coolant Type:Īlthough this rarely causes the problem if you have recently changed your coolant, then make sure that you have used the right type of coolant for your car a G12 Coolant is recommended for Audis. Since a car cooling system is a high pressure even the tinniest hole in the cap will leak coolant and create a check coolant level message. If there is no leak, then you need to replace the cap with a new one. If you have recently checked your coolant level and it was full, then you should check the cap for any leaks (usually around the neck area). Leaking Coolant Tank Cap:Ī leaking coolant tank cap can cause a low coolant level message on the Audi dashboard. Then the problem is caused by the sensor rather than low coolant. If the coolant level sensor malfunctions, this will cause a low coolant level message on your Audi dashboard.Ī simple way to check if the error is caused by a bad coolant level sensor is if you check your overflow tank (Coolant Reservoir) and if the coolant level is above the minimum mark. It measures how much coolant is in your car’s cooling system and sends this information to your vehicle’s computer. Bad Coolant Level Sensor:Īnother common cause is a bad coolant level sensor which is located under your Audi expansion tank (Coolant Reservoir).Ī coolant level sensor is a small electrical component that is attached to the cooling system. The first and most common cause of a low coolant message is simply that your coolant level is below the minimum required level, This is straightforward check your coolant reservoir, and if it is below the minimum, top up with anti-freeze. Now, lets look at the common causes of a low coolant level message. Switch Off Engine and Check Coolant Level Coolant Causes This doesn’t necessarily mean that you need to replace all of the coolant, what it means is that you should check where your current level is at and top up if necessary, however, this is not only caused by low coolant, other things like a leak in a cooling system. The first thing is that the message means that your coolant level is low and needs topping up. What to Do if the Turn off engine and check coolant level comes on your Audi?Īlthough the message is pretty straightforward, there are some things you should keep in mind when dealing with this issue.Switch Off Engine and Check Coolant Level Coolant Causes. ![]()
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