Get the definition of the B1989 Code when it comes on the screen of the code reader. You will get the definition from online what is called dictionary meaning but for the real meaning of the code, you need to read the manual of the car engine. There you will get more information like manufacturer name and model number. The dictionary meaning of the code is b Body Code Problem is antilock brake system, electronic suspension and steering systems. 1 for MFG – Manufacturer Specific. 9 for Fuel and Air Metering (Injector Circuit Malfunctions Only). 8 for Exhaust Gas Recirculation System Valve one. 9 for Kick-Down Switch Failed Short.