The B1698 Code is necessary thing and you should get the accurate meaning for this code. This code is found in multiple cars of different manufacturers but meanings are not same. The dictionary meaning of the code helps to understand the problem. Deactivation of cylinders is realized by discharging a synchronizer pin that usually interlocks the cam follower and rocker arms. The B1698 code determinations the synchronizer pin is unconfined using hydraulic compression which is maintained by a dedicated solenoid. 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. 6 for Vehicle Speed Control and Idle Control System. 9 for Crankshaft Position Sensor Circuit Performance and 8 for PCM Stack Overrun.