The general meaning of the engine C1884 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. 8 for Exhaust Gas Recirculation System Valve 1 and 4 for Cruise Vehicle Speed/Set Speed Difference Too High. You need to check the list to identify the car engine. Theos steps are Fuel Rail Pressure Sensor Circuit Malfunction, Cylinder 10 Contribution or balance Fault and Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical. Ford car manufacturer reports that these codes are all connected to software bugs.