When the car engine is examined, the B1320 Code has appeared. The code is related with the problem of the engine and if you do not find the meaning of the code, you cannot solve the problem. Because the same code is found in different model and manufacturers of car but the meaning of the code is different. However, if you want to solve the problem, you need also read the manual. The code has dictionary meaning and that is B for Body Code Problem is antilock brake system, electronic suspension and steering systems. 1 for MFG – Manufacturer Specific. 3 for IC Module 4X Ref Circuit Intermittent, No Pulses. 2 for Air Conditioning Clutch Feedback Circuit High Voltage. 0 for Transmission Engaged at High Throttle Angle.