2004 leon fr tdi - engine management light is on

Without any error codes no-one will be able to give you any advice im afriad.

A remap if done correctly wouldnt cause the engine light to come on. So aslong as it was done by a decent mapper. Thats fine.

However, the engine light coming on could range so many error's from just a sensor to a turbo fault.

If you have VAG-COM or know anyone near with it, get the error codes and post them up.

Good luck.

Its an intermittent fault in the wiring loom usually around glow plug 2 or 3 I have it with mine it comes and goes. When it happens I usually swap the faulty plug around with another but you need vag com to identify which one is at fault
Glynn

danwfr said:

also a remap wouldnt make this happen would it?

Click to expand...

nope.

mines come on today!
called the seat dealer and their head tec guy has told me that as long as the car is running normally then its ok to drive to work and back, the car literally feels fine! nothing is different!
their going to plug it in after work and see whats up....

hope its nothign big, its covered by warranty but still not a nice feeling!

turns out one of my glow plugs had died! they replaced all 4 about 2 months ago and the number 4 one has gone again!!

so its in next week for a change again! god knows why they have to have it all day though!

To change a glow plug takes approx 5 mins!
Glynn

hmmm maybe they want to run some tests..as its the second time in 2 months

I have had probs with my light coming on and a code suggesting a wiring fault to plug 3. What I have ended up doing is buying a new glow plug loom (£18) but as yet have not fitted it. Hope this cures my problem as I also replaced all my plugs 1 month ago!
Glynn

hmmmi might suggest that to the dealer then! their very good seeming as i have only had the car 6 months and its been in 3 times..!

It certainly does connect into another loom under the battery
Glynn

I get the ECU fault light coming on sometimes. It only started happening once I ripped out the EGR valve. Turns out for me the issue is emissions, which it past with flying colours, so I just ignore the stupid light.

This is ok until you get a fault which you dont find out about unless you can interogate the ecu weekly with vagcom etc.
Glynn

glynnd said:

This is ok until you get a fault which you dont find out about unless you can interogate the ecu weekly with vagcom etc.
Glynn

Click to expand...

That's true.
I have a service every six months or less and I check on vag.com myself, partly to cancel the error code and get rid of daily fault, but mainly its because I'm a geek.

Ive had the glow plug on mine and the egr fault too. Changed the glow plug and the light went out, cleaned the egr and the light went out. The light has now come on again after 2 months, I'm so excited, what can it be now! I dont feel right unless theres a light on my dash, If theres no light I just turn the traction control off just to get an orange light.

glynnd said:

To change a glow plug takes approx 5 mins!
Glynn

Click to expand...

Hmmm. Reading this thread with some interest. As far as I can tell I don't have a 'real' glow plug issue BUT have had vag-com faults that suggest glowplug issues with wiring faults to glowplugs 2 and 3 - it's a very long story, and is well detailed by Fester and I in the LCR twin fans thread around page 7.

When the warning light first came on the VAG specialist I went to said they wouldn't touch glowplugs because they were "tricky to do" and they'd have to refer me to "an engine specialist" for "a days work" to get them replaced. Smelled more than a little fishy at the time, and having read this thread I'm wondering were they attempting to fob me off?

Interesting that the wiring loom for glowplugs is under the battery compartment... as that's where the fans issue fix unit goes that's thought to be interfering and causing intermittent glowplug warning lights for Fester and I currently.