glow plug light flashing?

mack tdi

Member
Joined
Apr 29, 2006
Location
wexford, ireland
TDI
passat tdi
sorry if somebody has started a thread on this before!
i have a slight problem with my passats glow plug light that is getting really annoying:confused:
when i turn on the ignition, the glow plug light comes on for an instant and then goes out.......... for about 20 seconds, then it starts flashing away at me like an indicator!
their has been no change in perfomance what-so-ever, and no problems in starting the car at all!
i have checked the brake lights with a friends help and all seem to be working fine,
the car is an unmolested 97 tdi s passat 110bhp.
all and any help would be greatly appreciated:)
 

air870

Active member
Joined
Mar 11, 2006
Location
bombay
TDI
octavia I
had a similar prob . not sure which thread the solution is featured in but it says that you need to check your plugs with a volt meter to see if they need to be replaced.
 

Lefty

Veteran Member
Joined
Oct 21, 2005
Location
Lazear,Colorado Population 60
TDI
Jetta, 2000,Green GLS
Glow Plug Light

I had the same problem on my Jetta. Turned out it was the brake light switch went out. Does your cruise control work? Mine didn't when the switch went out.
 

catmandoo

Veteran Member
Joined
May 9, 2005
Location
ia
TDI
2000 jetta gls tdi,91 2dr jetta gl n/a diesel
don't know about the b4's but the a4's its the brake lite switch.
 

bhtooefr

TDIClub Enthusiast, ToofTek Inventor
Joined
Oct 16, 2005
Location
Newark, OH
TDI
None
Flashing glow plug light on an A4 means an electrical fault in a critical system. IIRC, it's the same thing on the B4, but I'm not certain. Brake light switch is the most common failure mode on A4s. Scan the car with VAG-COM.

On an A2, it means that the water separator needs drained. :D
 

mack tdi

Member
Joined
Apr 29, 2006
Location
wexford, ireland
TDI
passat tdi
well i got it hooked up to a VAGcom and the answer it gave was
"electronic control unit blocked":confused:
the guy cleared it for me, but couldnt actually tell me what the problem was in the first place?
i'll just have to hope that it doesnt happen again!,
if it does, i'll have to get it to a main dealer and have them run a full electronics test:(

thanks guys!:)
Mack
 

bhtooefr

TDIClub Enthusiast, ToofTek Inventor
Joined
Oct 16, 2005
Location
Newark, OH
TDI
None
Do you have an aftermarket stereo head unit?

If so, try unplugging it, and have it hooked up to a VAG-COM again.
 
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