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MARSH GUN

Golf TDI heater plug light flashing.

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Thought i would share a problem i encountered on our 08 golf TDI and help others if they get a similar issue with Volkswagen group cars similar age.

 Heater plug light came on  flashing i checked heater plugs all ok wiring fine could find no fault, bewildered i googled the problem and it seems the heater plug light doubles as a sort of secondary engine management light or electrical fault warning.

 Opinions seemed to suggest brake light switch and or brake light bulb failure , checking this out found the brake light switch had failed, i took out the lower dash changed the switch and bulbs but light still flashing, further reading said it could be Fuel exhaust sensor related issues. Yet my cheap code reader was throwing up no faults and car was fine.

  Not wanting the car to go into limp mode on the wife i decided she should use my car and i would use the golf the next day.

she asked me to pas her a cheap plug in phone charger pluged in the socket as soon as i removed it the flashing light went off, replaced it straight back on took it out off again.

So yes the aparently common brake light switch issue was at fault, but the phone charger plug i saw no reference to on the internet.  Hope others can gain from this if there vw / audi skoda has the flashing glow plug light.

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Mine came on a few days ago and it was the exhaust manifold gasket blown. 4.2 hour job for Vw but apparently it was a whole day for them .

T6 2017 

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