The engine C1908 Code is very important for the car engineers and it is also necessary to find the right meaning of the code. Do not use wrong meaning of the code for fixing the car engine problem. The automobile engineer need to know the real meaning of the code. However, the general meaning of the code is available online and it 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 8 for PCM Stack Overrun.