Without solving the car engine issue, you should not drive the car. If you do not know how to check or solve the car engine, you should not try to fix the car engine. The car engine P2616 Code is found from the car engine and the car engine code is related with your car engine problem. The general meaning of the car engine code is very helpful and it is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 6 for Vehicle Speed Control And Idle Control System. 1 for Low Coolant Circuit and 6 for Cruise Control System – Vehicle Accel Too High.