The engine P246A Code is very necessary thing what let you know about the car engine problem. If right meaning of the code is not followed, the engineer may make terrible problem in the car engine. However, automobile meaning of the code is general meaning and it is not very necessary thing. It is found online and 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 A for TFP Valve Position Switch-Drive Without Drive Ratio.