This code B1338 has several meanings what depend on the model and manufacturer of the car. Get the name of the manufacturer and model number for solving the problem. From the body of the engine, the problem has started and it is not very difficult to solve. You do not need to change any part or component from the engine and for this reason, cost of the repairing is not very high. 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. 3 for IC Module 4X Ref Circuit Intermittent, No Pulses. 3 for Cruise Control Servo Indicates Low. 8 for PCM Stack Overrun.