Driving home after work the car threw up another engine warning light. Pulled over and plugged in the trusty OBD reader which I've used far too much recently. Code was P0015 ("B" Camshaft Position - Timing Over-Retarded Bank 1). After some roadside googling I concluded that there was a high chance of a faulty sensor so drove home. Ordered two replacement sensors £30 each and performed a quick swap over with the battery disconnected. the fault code has not returned after I cleared with the ODB. Fingers crossed that's problem solved but I remain nervous. The sensors seemed gunked up, so perhaps were not working efficiently and had become sensitive. Anyway, hopefully some good knowledge for others and I truly hope for some trouble free driving. I love driving the RCZ but one more strike and I might start looking for a replacement.