The automobile meaning of the engine U1097 Code is online and it is U for Network Code Problem is climate control system, lighting, airbags, etc. 1 for MFG – Manufacturer Specific. 0 for Fuel And Air Metering. 9 for Crankshaft Position Sensor Circuit Performance and 7 for Cruise Inhibit Control Circuit. The U1097 engine code seems a sort of network problem and it is easy to fix the car engine problem. The deactivation process of cylinders is attained by releasing a synchronizer pin that usually interlocks the cam follower and rocker arms. The engine U1097 code resolves the synchronizer pin is free using hydraulic pressure which is skillful by a devoted solenoid.