The dictionary meaning of the P20C6 Code is found online and it is easy to get if you search 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 Fuel And Air Metering. C for BBV Sensor Circuit Low Voltage and 6 for Cruise Control System – Vehicle Accel Too High. Due to the powertrain problem, the code has come up. This problem of the car engine powertrain is very easy to solve. You can try to solve the problem by yourself if you have ability.