Find the meaning of the car engine P2084 Code what is found after the test of the car engine. The general meaning or automobile diction is found online and it is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 0 for Fuel And Air Metering. 8 for Exhaust Gas Recirculation System Valve 1 and 4 is Cruise Vehicle Speed/Set Speed Difference Too High. Read the car engine manual what is related your car engine to find the meaning of the car engine code. If you have all machines and tools, you can try to solve the car engine problem.