hey guys the check engine light came on in our 06 coupe (about 50K) the shop said the sensor reading indicated an air injector? needed replacing? but for the time being they reset the warning light because it was "in history" and said to let them know if it comes back on. Well it came back on so Im thinking it's the same issue. The shop quotted he $1500 for part - does this sound valid? If so I'll pay it but wanted to check here first. PS - I am not a mechanic.