my 2003 audi a4 finishes coolant and water within 20 mins drive and start giving a coolant message. but the temperature gauge remains at 90, what could be the problem
If there are no external leaks, then chances are the head gaskets are blown, this not something you can mess around with, continued running can cause sensor failures that will just add to the costs of the repair, not to mention you could burn up the engine if you do run out of coolant.
check for leakage, from all pipes, otherwise if there is none, then sounds like, your engine gasket, is burnt, probably as a result of once driving without either coolant or water, or poor circulation of both. kindly call a mechanic, and don't drive your car any more until the problem is fixed.
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