The automobile of the B2373 Code is found online and this meaning of the code is B for Body Code Problem is antilock brake system, electronic suspension and steering systems. 2 for MFG – Manufacturer Specific. 3 for IC Module 4X Ref Circuit Intermittent, No Pulses. 7 for Vehicle Speed Output Circuit and 3 for Transmission Control Module Reprogrammable Memory. The B2373 engine code is a kind of body problem. There are now 2 main types of cylinder diffusion used today, dependent on the type of the engine. The engine B2373 code for the pushrod type which uses solenoids to change the oil pressure carried to the lifters.