Renault Laguna fault codes??

it means you have a fault with the glowplug system,check your glowplugs are getting power supply and that they are getting a good earth through the engine,depending on access it might be worth taking them out and checking them and replacing if knackered,check the wiring to your glow plugs and check the relay/control unit is working ok,your other fault lies within the intake system so could be anything from a leaking intake pipe to a faulty sensor,is there any starting problem with engine running or lack of power?