The B1820 Code has exact meaning and it is essential to get all of the meanings. The general meaning of the code is also required to resolve the trouble from the engine. The code has certain meaning for your car and all of the cars have the code but meanings are different. You should get all meanings of the code for solving the issue of the engine. The dictionary meaning of the code is B for Body Code Problem is antilock brake system, electronic suspension and steering systems. 1 for MFG – Manufacturer Specific. 8 for Ignition System or Misfire. 2 for Conditioning (A/C) Clutch Feedback Circuit High Voltage and 0 Transmission Engaged At High Throttle Angle.