The B1951 Code has a dictionary meaning and it is related with the car engine. The dictionary meaning of the code B1951 is B for Body Code Problem is antilock brake system, electronic suspension and steering systems. 1 for MFG – Manufacturer Specific. 9 for Fuel and Air Metering. 5 for TP Sensor Learn Not Complete and 1 for TFP Valve Position Switch-Drive Without Drive Ratio. You can solve the problem if you have experience and machines. It is very easy to solve the problem of the car engine and you do not need to change any machines for solving the problem from the car engine.