Hi all we've just replaced the head gasket on said car, started up and ran fine then cut out so started up again fine then ran a bit lumpy so took for a drive and all was good again, customer took car and been driving it for couple of weeks and runs fine tilll u come to junction it very nearly stalls doesnt but very nearly does its been pluged in and the only code that comes up is 2731 now does the valvetronic motor need recalibrating or could it be something else? Any help would be greatly appreceated.


Ps its n42 engine