I bought a 2nd hand Nissan X trail on 13th January from a local dealership. On 6th February I reported to the dealer that the car was making a loud noise from under the bonnet and that the engine management light had come on. We agreed to send it to my local Nissan dealership for them to run a diagnostic check. They diagnosed the fault code as an EGR fault and said that the noise could be coming from a worn turbo. They advised replacing the turbo and intercooler.