The engine C1839 Code is a necessary thing and it is important for solving the car engine problem. Do not use general meaning of the code is C for Chassis Code Problem is controller area network wiring bus and modules. 1 for MFG – Manufacturer Specific. 8 for Ignition System Or Misfire. 3 for Cruise Control Servo Indicates Low and 9 for Kick-Down Switch Failed Short. However, the system was upsetting, misinterpreted by customers, and a rash of random failures led to the technology being fast retired. Do not drive the car with any engine problem. Make sure that you have solved the engine problem.