Do not try to check solve the car engine without getting proper information about the car engine and car engine problem. The car engine code is necessary to know before taking any step for solving the car engine. The meaning of the car engine P2738 Code can be automobile dictionary meaning and it is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 7 for Auxiliary Emission Controls. 3 for Cruise Control Servo Indicates Low and 8 for PCM Stack Overrun. You must look for the real meaning of the code first.