If it starts ok at -2 I would leave well alone. You could swap the horn relay they are both rated at 70A. Clear the code and see if it comes back?
 
Doing the glow plug isn't that difficult, but the manifold does need to be removed, which requires the fuel filter and it's support assembly be removed first.

I've not come across a stuck FL2 glow plug, but care is needed, as they are very thin.
Hi , can you recommend a good quality glow plug to buy for this cheers
 
Hi , can you recommend a good quality glow plug to buy for this cheers
Any of the OE manufacturers would supply good quality plugs, so that'll be NGK, Bosch, Denso and the like. Looks Advanced Factors list NGK and Bosch, so I'd go with their stock items, as AF only supply quality components.

I tried some £15 a set plugs from ebay with a 5 year guarantee:eek:, as I was planning on replacing my cylinder head in the future.
I'll test them when I do replace the head, and decide at the time if I should fit OE plugs, or keep the cheap ones.
 
Bumping this up the line because i have a P0380 code on my new TOPDON AD500 PRO+
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https://www.ebay.co.uk/itm/33543426200

Nodge is helping along with others on the other side.
 
My FL2's glowplugs have been u/s for years and the car has started reliably even in the depths of winter . . . in Scotland. In balmy Devon, I wouldn't bother.
 
Not sure about 2008 model but at some point there was a Glow Plug Control Module under LH H-lamp, accessible from wheel arch. I do know there is a grey 4 pin connector between plugs and ECM, near top of engine on right, as you look at it.
If car is starting fine. Have you tried clearing the fault code and re-reading ? Could be a leftover.
 
Not sure about 2008 model but at some point there was a Glow Plug Control Module under LH H-lamp, accessible from wheel arch. I do know there is a grey 4 pin connector between plugs and ECM, near top of engine on right, as you look at it.
If car is starting fine. Have you tried clearing the fault code and re-reading ? Could be a leftover.
The glow plugs changed voltage in 2011, when the new chassis numbering system was introduced. The up to 2011 plugs are 11V plugs, these are switched with a simple relay and also has a monitor circuit. After 2011, the plugs went to 5V, which required a glow plug controller module, which also has glow plug monitoring. NGK make the genuine LR plugs.
 

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