You must not try to solve the car engine problem in your place if all tools are not available. You need to expertise to solve the car engine problem. For the checking the car engine, you have to use expensive machine and for your car engine, the car engine P1505 Code has been found. Now you need to use expertise to solve the car engine problem. You can use automobile dictionary meaning when it is necessary. The automobile dictionary meaning of the code provides general information. You will use that meaning when you have no any better option (real meaning). A test drive finally recommended.