The B1986 Code comes when the car engine is tested by the expensive machines. The meaning of the code is important thing to know and you will get the real meaning if you read the manual of the router. Basic 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. 8 for Exhaust Gas Recirculation System Valve one and 6 for Cruise Control System – Vehicle Accel Too High. The body of the engine has the problem and it is easy to fix.