The engine C1909 Code tells of the correct meaning of the engine problem. Do not allow wrong meaning of the engine code for fixing the car engine problem. The automobile meaning of the engine code is not used much but you can know about this meaning. The automobile meaning of the code is C for Chassis Code Problem is controller area network wiring bus and modules. 1 for MFG – Manufacturer Specific. 9 for Fuel And Air Metering (Injector Circuit Malfunctions Only). 0 for IC Circuit High Voltage and 9 for Kick-Down Switch Failed Short. Do not drive the car with any type of engine problem.