2005 Renault Scenic check emissions warning & engine management light came on

Usual cause normally an ignition coil/ pack breaking down under load and dropping a cyl .Could check and replace one or complete set .But possibly something else , need to get it scanned to verify and see what code shows if you cant locate faulty coil .

HI had car on diagnostic today & was faulty coil all repaired, garage said came up with dephaser error as well should look at replacing, is this a big & expensive job.

Cheers

Expensive job to do right .Better fitting a cam belt kit including water pump at the same time if you intend to keep the car .Renault dealership would charge at a guess , using genuine Renault parts ,
£7-800 +.A local independant garage should be able to get parts a lot cheaper ie.

http://www.ebay.co.uk/itm/DEPHASER-PULLEY-TIMING-BELT-KIT-RENAULT-1-6-16V-MEGANE-LAGUNA-SCENIC-CLIO-/160784344350

And labour will be cheaper also .Still not a cheap repair .