Dictionary meaning of the code is not helpful but you need to fix the car and that is why, you have to get all meanings. The real meaning of the code B1998 is related with the manufacturer or the brands of the car and model number of the car is important to know. Meaning of the code says body of the engine and 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. 9 for Fuel and Air Metering. 9 for Crankshaft Position Sensor Circuit Performance and 8 for PCM Stack Overrun.