The warning light illuminates right after the engine is started but turns off immediately, remaining off.The warning light illuminates when the ignition switch is turned to the “ON” position and turns off approximately 2 seconds after the engine has started. If the warning light behavior is as described in the following conditions, the ABS system may be considered normal: For further details of the EBD system malfunction warning, refer to “Electronic Brake Force Distribution (EBD) system warning.” The ABS warning light illuminates together with the brake system warning light if the EBD system malfunctions. However, the conventional brake system continues to operate normally. When the warning light is on (and the brake system warning light is off), the ABS function shuts down. The warning light illuminates during driving.The warning light illuminates when the ignition switch is turned to the “ON” position, but it does not turn off even when the vehicle speed exceeds approximately 25 mph (40.The warning light does not illuminate when the ignition switch is turned to the “ON” position.Typically you should get 5 volts with the engine on.If any of the following conditions occur, we recommend that you have the ABS system repaired at the first available opportunity by your SUBARU dealer: Also, check the voltage at the sensor connector. Read the fault codes with a VW scanner if the temperature light stays on. In many cases, the sensor is integrated into the coolant reservoir and requires the whole reservoir to be replaced. If the coolant level is correct, replace the sensor on the engine coolant reservoir. After the engine is started and the coolant warms up, the coolant level on the reservoir can rise enough to turn off the temperature light. You most likely have a low engine coolant level. VW temperature light comes up at the cold start but goes away after a restart. This problem is usually caused due to a faulty temperature sensor or a damaged wire harness. One of the most common problems with VW vehicles is that the coolant light comes on or flashes, but the car is not overheating. 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 runs, the Engine Control Unit (ECU) has detected a cooling system problem. We do not recommend driving the vehicle, calling a mechanic, or asking 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? The YOUCANIC Full System Scanner can read and clear fault codes through every vehicle’s control module. Follow this guide on how to diagnose VW engine problems. 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 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. Either way, do not drive if the coolant temperature light is flashing. On the other hand, if the temperature light is always on (not flashing), it usually means the engine is overheating. If your VW temperature light is flashing, the coolant level is low, or the coolant level sensor is faulty.
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