The real meaning of the B1937 Code is possible to know when you have read the manual of the car or you know the manufacturer name and model number. In the manual of the car, you will get several meanings what are important for you. The general meaning of the code is not so important but it is necessary. The general meaning of the code 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. 3 for Cruise Control Servo Indicates Low and 7 for Cruise Inhibit Control Circuit.