Identify the meaning of the B1451 Code is very easy thing if you know the model and manufacturer of the car and engine. The B1451 Code is easy to describe as B for Body Code Problem is antilock brake system, electronic suspension and steering systems. 1 for MFG – Manufacturer Specific 4 for Transmission. 5 for TP Sensor Learn Not Complete and 1 for TFP Valve Position Switch-Drive Without Drive Ratio. The code comes for the body problem of the engine and it is not necessary to bring any change in the engine or component of engine. Do not try to solve the problem.