Hi, I've got a 2010 Fabia 1.9TDI. Had it since Christmas. I don't think it's been serviced since 2017. My knowledge of all things auto is rubbish - so bear with me!!
So about 2 weeks ago the 'coil engine light' came on (flashing). As per the forums here I changed my brake light bulbs. No change. A day or so later the 'Engine management' light came on and it's been in limp mode ever since. I put in some Wynns particulate filter. No change. I took it to a garage who said it needed a new EGR (£500 for replacing it with a Skoda one from new).
As the £500 is not a option at the moment I thought I'd try a few things first. As per the forum here, I bought an EGR spray (£17). I took off the air filter and sprayed half a can in the pipe there and took it for a long run. No change. One guy on a forum said it should be sprayed in the fatter tube below the one that I did it in, but I was not happy to do this as 1. I couldn't get the sort fat pipe off with the jubilee clips loose and 2. I bottled it as a novice in worrying territory!!. So then I spryed the other half of the can in the same place the next day. No change.
So next I bought a OBD 2 meter for £20 and got 2 fault codes. P0406 c or P0407 I think (can't remember now!) I re-set the codes so that I could drive it normally & not in limp mode. Then I put in a bottle of 'Cataclean' with 1/4 of a tank left and gave it an Italian service of doing 70mph in 4th gear for 15-20 mins once the fault code re-set had worked.
The 'engine management light went out!!! (the one shaped like an engine block) But the coil light has returned an hour later and flashes still - but randomly. ie it is not there when I start and comes on after 15 mins and stays on.
Any suggestions - should I throw in a bottle of BG244 for example?? Should I buy a new brake light switch - or do the codes mean that it is the EGR? Any advice is much appreciated.