The error B1398 Code has appeared for the mistake of engine. When you want to fix the problem of the engine, you need to know the meaning of the code well and learn about the manufacturer, model and get the manual. Now, it is easy to get the solution. The poor performing signs are steady with a MAP sensor fault. In addition, in some cases, a bad MAP sensor will not chuck a code. Again, the ELD code likely symbolizes an isolated cabling issue. This code has isolated meanings and that is B for Body Code Problem is antilock brake system, electronic suspension and steering systems. 1 MFG – Manufacturer Specific. 3 for IC Module 4X Ref Circuit Intermittent, No Pulses. 9 for Crankshaft Position Sensor Circuit Performance and 8 for PCM Stack Overrun.