The automobile meaning of the engine C1736 Code is not necessary thing but it gives some general information. The automobile meaning of the engine C1736 Code is C for Chassis Code Problem is controller area network wiring bus and modules. 1 for MFG – Manufacturer Specific. 7 for Auxiliary Emission Controls. 3 for Cruise Control Servo Indicates Low and 6 for Cruise Control System – Vehicle Accel Too High. The C1736 engine code seems a type of chassis problem and this problem can be fixed easily. You need to read the car manual and know the car information for solving the car engine problem.