You need to fix the car engine if you face any problem. The engine P20DC Code is necessary thing for solving the car engine. The general meaning of the code is not found in the manufacturer but you can find it online. The dictionary meaning of the code is P for Powertrain Code – Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 0 for Transmission. D for BBV Sensor Circuit Low Voltage and C for TFP Valve Position Switch-Drive Without Drive Ratio. You have to solve the car engine problem according to the manufacturer information.