This faulty B1658 Code is related with the engine. When engine has any trouble, the code appears while the engine is diagnosis. It seems that the body of the engine has the main problem. If you read the dictionary meaning, you will know more information. The meaning of the code B for Body Code Problem is antilock brake system, electronic suspension and steering systems. 1 for MFG – Manufacturer Specific. 6 for Vehicle Speed Control and Idle Control System. 5 for TP Sensor Learn Not Complete. 8 for PCM Stack Overrun. For the body problem, the code B1658 has come up.