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Discussion Starter · #1 ·
Only noticed it whilst out just now, the glow plug light flashes on/off while the engines running.

It dissapears as usual when you turn the ignition on, then after a minute or so it starts flashing[!][!]

Can anyone help please.[?][?][?]

Lee.
 

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Discussion Starter · #2 ·
Have just checked in the VW handbook, it say's its a fault with the engine management system and should be checked by a VW stealer as soon as possible.[V][V][V][V][V][V][V][V][V][V]

Anyone know what could be going wrong.
 

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Discussion Starter · #3 ·
Sorted the problem now.

Brake light fuse 13 had blown causing the glowplug light to flash.

Wonder how much VW stealers would have charged to sort that.[B)][B)]
 

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i had this and it was the brake light switch, think the switch was about ?7.00 iirc and it's a 2 min job to fit

i was told this by stevo who also had the same problem.
 

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It seems to be a cotton-wool style safety feature, that if the brakelights fail (bulb, fuse, whatever) the check engine light comes on - quite a few have reported this sort of behaviour.
 

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Alos the engine management recieves a signal from the brake light switch and related circuit.

It uses this signal for a multitude of things like anti stall as it alters pump timing when your foot is on the brake to stop the engine cutting out when you approach a roundabout or juntion.
 

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Discussion Starter · #7 ·
Cheers Lads.

Luckily, I didn't have to go as far as replacing the brake light switch, it was just a blown 10amp fuse.[:p][:p]
 

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Has anyone replaced the brake light switch - is it easy to do or do I need to book it in as I've the problem above...

cheers,

A
 

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It's not as easy as you think.

The alignment pegs and the switch body have to be set correctly (trial and error) by rotating the assembly before it's offered up into the mounting hole. If you dont get the alignment right the new switch will not work.

I learnt this by doing it, it took me over an hour to figure it out though.

Also, your fuse blowing is / was probably caused by the contacts in the switch getting dirty / arcing etc. I managed to remove and dismantle my switch and clean it up but this was only a temp fix, in the end I bought a new switch, as stated above about ? 7.

Best tip is to Really Really pay attention to how the things fits before you take the old one out.
 

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Well, just been relieved of ?50 by the local VW dealer who replaced the faulty switch. However the light's still flashing & they want the car for "about half a day for wiring investigation". I might have screwed something up when I did the Cruise install - however VAGCOM showed it as successful install... Ho hum - any ideas?
 

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Brake lights are fine, will check fuses tonight tho I'm surprised VW diagnostics wouldn't spot that. However typing this has just reminded me of how sick I felt when overhearing two of the guys at the dealers bragging how they charged a punter over 360notes for something which was warrenty covered - 'nuff said...
 

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My glow plug light flashed exactly the same as this when my Bosch MAF was on its way out. It did this before i even noticed the decline in performance. I assume there would be a code recorded on VAGCOM.
 

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Discussion Starter · #15 ·
On the way home from footie training and its happenend to me again.[:(!]

Have checked fuse 13, which was the problem last time, but thats ok.

Has anyone got any info on the brake light switch, whereabouts its located, and is it easy enough to change.[?][?]

Cheers

Lee
 

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Discussion Starter · #17 ·
Alright Joey.

The 1st time it happend I had a blown rear brake light bulb, just replaced that and it stopped flashing.

The 2nd time it was the brake light switch, got a new one for about ?6, and replaced that and its been fine since.

Its happend to quite alot of members here[V]

HTH
 

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Well, i got up to speed, did an emergency brake and its worked fine for the rest of the day!

No brake lights were working at all to start with.

Guess its only a matter of time before i need a new switch.
 

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Morning all,

First time on here and am really hoping you can help!

Similar problem to below, driving along on the motorway ~ 15 miles and the car kind of shudders (a bit like when bump starting but less severe) and the coil lamp comes on and flashes at me until I get to work and switch the ignition of an on again. Did this to me yesterday and was fine on the way home......

Observations and changes; has felt a little sluggish at times, not enough for me to be sure though; also about a month ago I had the software reflashed as it had developed the neat trick of opening all the windows for passing criminals.

Brake lights appear to be working, both sides....

Please help as I am looking at taking to the dealers and would really like to not grab my ankles....car is a 55 plate Mk5 GT TDI (140) ~53K on the clock.

Hoping for a simple cheap outcome!

Jim
 
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