Do not drive the car when you face any problem in the car engine. The engine P1500 Code has right meaning and automobile dictionary meaning. You can use automobile dictionary meaning of the code when it is available but you should look for the real meaning of the code first. The automobile dictionary meaning of the code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 1 for MFG – Manufacturer Specific. 5 for Computer And Auxiliary Outputs. 0 for IC Circuit High Voltage and 0 for Transmission Engaged At High Throttle Angle. Allow an automobile engineer to solve the car engine if you do not know how to fix the problem.