The automobile dictionary meaning of the engine P246B Code is not used for solving the car engine problem. The automobile dictionary 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 B for TFP Valve Position Switch-Drive Without Drive Ratio. You need to test the car engine to know the real problem of the car. You can check all symptoms to find the real cause of the car engine problem.