LouisS

Hi all, some context: I bought my first 350z at the end of August this year and when changing the spark plugs shortly after, I noticed that there was oil around a couple of the the spark plugs so went ahead and purchased two new OEM valve covers (or rocker covers which ever it is). I’ve since completed that and happy that the oil is now flowing within the engine not out however, today when I finally got it back out the garage, I was met by an engine management light and the car in limp mode. I put a code reader on it and get P1233 and C1131 codes. I tried clearing them and trying again but no joy, they come back after about a minute. i noticed the engine seems to be struggling to idle and eventually bogs down and the light comes on. I’ve check connections to things such as throttle bodies, cam sensors, intakes, coils packs etc but no joy. Does anyone have any ideas of possible areas to check or maybe someone can point me to a recommended garage/350z specialist in the Lincolnshire/Nottinghamshire area?