VW coolant light comes on, but the car is not overheating? In rare cases, VW red coolant light may flash or stay on due to an electrical problem such as a faulty ECU or instrument cluster, but those problems are rare.
The engine may have overheated, or a sensor is operating out of range. If the red coolant light stays on when the engine is running, it means that the Engine Control Unit (ECU) has detected a cooling system problem. We do not recommend that you drive the vehicle, call a mechanic, and ask for advice. If you are not sure, contact an auto mechanic. If it is an electrical issue, the car may run fine, but you need to get the car diagnosed first. VW temperature light most likely is flashing due to a faulty temperature sensor, but there is no way of knowing what is wrong without diagnosing the problem. You may blow a head gasket, or the engine may seize up. If the engine overheats and you continue to drive, you will cause expensive damage to the engine. Do not drive if the temperature light is flashing. Should I drive if the VW temperature light is flashing red?
#Volkswagen battery indicator how to
Follow this guide on how to diagnose VW engine problems.
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Typically when your VW temperature light stays on or is flashing, you will not get a DTC code if you read codes with a generic OBD-II scanner. Damaged wire harness to a temperature sensor.Other possible but less likely causes include: Volkswagen temperature light for any of the following reasons: If the temperature light keeps flashing, check if the cooling fan is spinning by looking at it. Restart the vehicle and check if the temperature light has turned off. If the engine coolant level is low, add engine coolant. Pull over as soon as it is safe to do so and turn off the engine. Allow the engine to cool down, then check the engine coolant level. If the car runs great with no overheating issues, the problem usually is electrical such as a faulty temperature sensor mounted on the coolant reservoir. For example, the temperature light flashes when you first start the car but stops flashing after the engine is warmed up or if the engine is restarted. Sometimes VW temperature light flashes intermittently. If you decide to drive, make sure the engine is not overheating. On the other hand, if the temperature light is always on (not flashing), it usually means the engine is overheating.Įither way, do not drive if the coolant temperature light stays on or is flashing. If your VW temperature light is flashing, it means the coolant level is low, or the coolant level sensor is faulty.
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