2003 Volkswagen Passat heating plugs sign flashing while driving.

A flashing glow plug light usually indicates an engine control malfunction which means getting it scanned to see what triggered light .Could be something small like brake light bulb and also worth checking all levels as on some this can trigger light .

@whittinghame or whatever your name is. Please stop answering random questions with extremely vague answers just to keep your post scores high

It's a common fault with vw diesels that injector failure is imminent if the heater light flashes. You will have to get the codes read with a garage or a vsg.com cable for your PC or tablet.

Tony 811926 ,
The answer I have given is correct and I have no need or desire to increase my post count as you insinuate .The flashing glow light is indicating that the ecu has detected and logged a fault , which could be many possible causes . " injector failure is imminent " is rubbish . From a VW forum ,

"A flashing glow plug light can be attributed to several conditions, most likely a burned out brake light or two and a defective brake light switch. (There are recalls for those switches, depending on the model year "



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Why isn't this in the owner's manual? I think I looked on every page for what a blinking glow plug light means! I was a little afraid that it might be serious. Oh well. 2 new brake lights appear to have fixed the problem. "

There are many other similar replies elsewhere on different VW forums confirming what I said , but we must all be wrong and you are right .

Having been on here for years ,answered thousands of questions and been thanked by many , I dont need your childish comments on how to reply .Random questions ????? I dont know how we managed for all those years till you came along .I have no desire to get in a slanging match with you as you seem intent on doing .Best wishes ,Whittingehame .I dont know what your problem with that name is also ?