The engine P0644 Code tells about the car engine’s powertrain problem. The powertrain problem is related with the P and it is easy to solve without changing any part of the car engine. The engine code’s meaning is found from the car engine’s manual. Do not use any meaning of the code what may make terrible problem from the car engine. The solution of the powertrain problem is not difficult task and it is not costly. Do not use false meaning for solving the car engine. For the false meaning, you will get more problem in the car engine. However, once the car engine is fixed, you must test the car before drive the car.
The automobile dictionary meaning of the code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 0 for SAE – Generic. 6 for Vehicle Speed Control And Idle Control System. 4 for BBV Sensor Circuit Low Voltage and 4 for Cruise Vehicle Speed/Set Speed Difference Too High. The engine code is linked with the powertrain problem. However, if you do not know how to solve the car engine, you should not try to solve the car engine. You should hand over the car to automobile engineer.