The P20C3 Code has a certain meaning according to the manufacturer of the car and meaning of the engine is not similar for all car engines. The meaning of the car engine changes according to the manufacturer. For this reason, getting the manufacturer information and car information is not same. The common meaning of the code is P for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific 0 Fuel And Air Metering. C for BBV Sensor Circuit Low Voltage and 3 for Transmission Control Module Reprogrammable Memory. Powertrain problem can be fixed easily.