The engine P0986 Code supports to solve the car engineer to fix the car engine properly. Do not apply wrong meaning of the code what you have found online. You will get the automobile dictionary meaning of the code from online and it is fully necessary to solve the engine issue. The automobile dictionary meaning of the code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 0 for SAE – Generic .9 for Fuel And Air Metering (Injector Circuit Malfunctions Only). 8 for Exhaust Gas Recirculation System Valve 1 and 6 for Cruise Control System – Vehicle Accel Too High.