Join Date: Jan 2008
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Just had the same problem on a 1.9dci laguna. I don't think there is a single cause but mine was a broken wire just where it enters the plug on the
boost presure sender, which is on the plastic intercooler pipe. I got the local garage to put it on a diagnosis machine and the fault code pointed to a bosst presuure / air flow sender system problem. Its probably easiest to do a diagnostic check. My local charged £40 and Renault wanted £110!!!!
Currently in nigelplant's garage:
2001 Laguna 1.9dci