The general meaning of the P20F0 Code is P for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 0 for Fuel And Air Metering. F for BBV Sensor Circuit Low Voltage and 0 for Transmission Engaged At High Throttle Angle. The P20f0 engine code seems a kind of powertrain problem. The engine system, in conjunction with the engine control module (ECM)/powertrain control module (PCM), activates the P20f0 code solenoid valve to switch oil compression to the engine mechanism that is connected in the valve system to change valve timing between Low and High. If the engine solenoid valve has an open/short circuit, a DTC is stored.