The automobile dictionary meaning of the car engine P2709 Code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 7 for Auxiliary Emission Controls. 0 for IC Circuit High Voltage and 9 for Kick-Down Switch Failed Short. Like the all car engines, this car engine system services especially advanced hydraulic lifters what is known as switching roller followers for the engine P2709 code intake and finish valves. The lifters can be misshapen by disengaging an inner locking pin. The locking pin is disconnected using solenoids to change oil compression fed into the lifter.