The engine P246D Code has the automobile meaning and it is not used for solving the car engine. The automobile meaning of the engine code is p for Powertrain Code – Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 4 for Fuel And Air Metering (Injector Circuit Malfunctions Only). 6 for Vehicle Speed Output Circuit and D for TFP Valve Position Switch-Drive Without Drive Ratio. No part is necessary to solve the car engine problem. The vehicle service manual should be checked for more information on thinkable reasons of the fault, along with obligatory testing.