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Obviously it's temperature gauge light. Check for coolant level first. Then check for coolant leak. If coolant is leaking out of your car, the lower coolant levels in your engine will cause it to overheat. If you have your heater on and it starts blowing hot air instead of cool, your engine is low on coolant. This will cause to flash a warning light on your car's dashboard.
That means low coolant level. Note that it might missing a lot more coolant that you think, best if the dealer checks it, because VW can use only the BLUE or PINK Pentosin-coolant (depending on your model) that is made by VW. If you mix it with the ordinary green-coolant available in auto stores, it will slowly but surely destroy the engine. Thats why many VW-owners have to repair the head-gasket after a while
SOUND LIKE ENGINE COOLANT LEVEL LOW.CHECK COOLANT SURGE TANK.IF LOW MORE LIKELY RADIATOR COOLANT LEVEL LOW.ADD COOLANT TO COOLANT SURGE TANK UNTIL COOLANT LEVEL STAY AT FULL COLD MARK DONT OVERFILL OVERFLOW JUG.
vw beetles do not have a temp gauge so instead when the car is cold the light is blue at normal temp no light when over heating or low coolant red light and it beeps, you need the right coolant for your vw it is pink in color and some napas have it (Not DEX Cool) and you probably have a coolant leak, usually a plastic flang at rear of cylinder head goes bad
Change the radiator cap. The spring on yours is getting week. The reason it does it when you shut it off and doesnt do it when its running is cause the water pump sucks the coolant out of the radiator while it is pumping so there is not much pressure on it but when you shut car off the coolant stops curculating and egine heat is not transfered coolant exspands and pushes on the cap. If your spring in the cap is getting week then it pushes it up letting the coolant pass by to your overflow tank.
IF THIS THE LOW COOLANT LIGHT THE THE SENSOR IN RESAVOR MAY BE BAD BUT IF IS THE COOLANT SENSOR LIGHT VW HAD ISUSSE WITH THIS SENSORN REPLACE SENSOR BUT THESE CAR ARE HARD TO GET AIR OUT OF SYSTEM ANY AIR CAN COUSE THIS HOPE THIS HELPS
ABS and coolant are unrelated unless there is a problem with the ECM (engine control module) or instrument panel. Is the red coolant warning sign for coolant level or temperature?
With ABS if there is any failure with any brake electronic component (sensor, motor, or fluid level etc) the ABS will shut down completely and flash the light. If the light is on or flashing the ABS is non functioning.
I need better information on the coolant and ABS to give better information.
Most probably an air pocket in ur coolant system, just let it run without the cap on the coolant bowl until no bubbles come out. As for ur oil light and buzzing, it's most probably the low oil level sensors tripping out, which is normal for a VW.
There are two oil sensors, one on the front of the engine near the distributor and one on the right hand side of motor when ur facing the motor. The are both the same size and have only 1 wire on em.
If i remember one has a white connector and one has a black connector. Costs about 20 bucks for the pair.