The B2161 Code is important thing for understand the problem of the car engine. You can know the meaning of the code from the dictionary but it is not all to solve the problem of the car engine. The dictionary meaning for the code is B for Body Code Problem is antilock brake system, electronic suspension and steering systems. 2 for MFG – Manufacturer Specific. 1 for Transmission. 6 for Control Module Throttle Actuator Position Performance and 1 for TFP Valve Position Switch-Drive Without Drive Ratio. You should not drive the car if the car engine problem is not solved.